Question about Casio FX-9860G Graphic Calculator

# When I type in a function for y1 and have it in standard form the calculator says range Error. How do I change the range, because it wont let me go to the graph. Which is where I would then click V-window to change the range, but that wont even work. Please help!!! I have a Casio fx-986oGII.

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### k24674

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• Casio Master

A linear function in standard form is of the form Ax+By+C=0, where A is a positive integer, B and C are integers (positive or negative).
The problem is that calculators graph a function given in functional form y= ax+b.Thus to graph a function in standard form by means of a graphing utility you must isolate the y variable. The interesting thing about the Prizm (Casio graphing calculator) is that you select which variable to isolate y (usually) or x if you so choose. To choose to graph the function x=Dy+E you must select the function type as X=.

Posted on Sep 16, 2013

### k24674

The Casio FX-115W/991W/115E/991ES have three functions P(, Q(, R( and t(: the last one calculates the normalized variable noted t. The Sharp EL-520W ans several similar Sharps do it too. Here is a screen capture. Posted on Jun 22, 2010

### k24674

The Casio FX-115W/991W/115E/991ES have three functions P(, Q(, R( and t(: the last one calculates the normalized variable noted t. The Sharp EL-520W ans several similar Sharps do it too. Here is a screen capture. Posted on Jun 22, 2010

### k24674

I assume you know the theory. I will show you the key strokes for 1-Var statistics and 2-Var statistics
Press [MODE][3:STAT] [1:1-VAR]. You are ready to enter values in the X column.
Enter a number and press [=]. Cursor jumps to second number to enter.
Keep entering numbers and pressing [=] till all numbers are in. Press the [=] key after the last one.
Press [AC] key to clear the screen.
Press [SHIFT] [STAT] (above digit 1.) then [5:Var]. Screen displays the statistical variables 1:n ;2: x bar; 3: x sigma n; 4:x sigma n-1.
Press the number corresponding to Referable you want, ex 1:n . The variable appears on screen. Press [=] and it will be displayed.
To display another variable press [SHIFT][STAT][5:Var][ 1,2, 3, or 4] .

- To access the sum of squares sigma x^2 and the sum of data sigma x press[SHIFT][STAT][4:SUM] then [1: for sigma x^2] or [2: for sigma x]. Press [SHIFT][STAT][6:MinMax] to access minX and maxX.

To perform 2 variable statistics you press [MODE][3:STAT] and any of the other regression options (except 1:1-Var). A two column template opens where you enter the X and Y values. When finished entering data, press [SHIFT][STAT][5:Var]. to access the different statistics. As I assumed above, you should be able to recognize what each variable means.

Posted on Jul 18, 2010

### k24674

This will show you how to do statistics (calculate average, standard deviation, regressions etc.) as to the mode and median refer to the definitions.

TO COMPUTE STANDARD DEVIATION AND 2-VAR STATISTICS.

I assume you know the theory. I will show you the key strokes

For 1-Var statistics
Press [MODE][3:STAT] [1:1-VAR]. You are ready to enter values in the X column.
Enter a number and press [=]. Cursor jumps to second number to enter.
Keep entering numbers and pressing [=] till all numbers are in. Press the [=] key after the last one.
Press [AC] key to clear the screen.
Press [SHIFT] [STAT] (above digit 1.) then [5:Var]. Screen displays the statistical variables 1:n ;2: x bar; 3: x sigma n; 4:x sigma n-1.
Press the number corresponding to the statistical value you want, ex 1:n . The variable appears on screen. Press [=] and it will be displayed.
To display another variable press [SHIFT][STAT][5:Var][ 1,2, 3, or 4] .

To access the sum of squares sigma x^2 and the sum of data sigma x press[SHIFT][STAT][4:SUM] then [1: for sigma x^2] or [2: for sigma x]. Press [SHIFT][STAT][6:MinMax] to access minX and maxX.

For 2-var statistics
To perform 2 variable statistics you press [MODE][3:STAT] and any of the other regression options (except 1:1-Var). A two column template opens where you enter the X and Y values. When finished entering data, press [SHIFT][STAT][5:Var]. to access the different statistics. As I assumed above, you should be able to recognize what each variable means.

Posted on Apr 21, 2011

### k24674

Open the window configuration ans set Ymin to -10. You can also access the ZOOM function and select Zoom Standard.

Posted on May 08, 2012

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× ## Related Questions:

### When i am graphing and I enter- Y1=Sin(theta) it does not graph it and says syntax error

When drawing function graphs of type Y1=, the name of the independent variable should be X
For polar graphs r=.., the independent variable is theta, while for parametric graphs it is T
To enter the default independent variable, press the key marked [X,Theta, T] . It will type in the correct name.

Sep 18, 2011 | Casio FX-9750GPlus Calculator

### I don't remember how to type a piecewise function into the y= screen so that i can specify i want one graph (.5x+5) from 0&lt;x&lt;10 and the other (10+2x) x&gt;10

Here is an absurd example of a piecewise function
Y1=11 for X less than 10
Y1=3 for X in the range [10, 20[
Y1=X+5 for X in the range [20, 30[
Y1=10 for X larger than 30

Here is the screen capture of the Y= editor window.
You have
1. the definition of the function within a domain, enclosed in () followed by the domain enclosed in ()
2. a + to introduce the second piece (definition) (domain)
3. + a third piece (definition ) (domain)
4. and so on.
5. Use the [2nd][TEST] key sequence to access the relational operators, less than, greater than, etc.
Here are two screen captures for the Y= editor and the resulting graph. You have to play with the window dimension to display a clear graph. Note : 3 pluses in equation, 4 pieces in graph.
The + in the definition of the function, (X+5) in the third interval does not count towards the number of pieces.  You can use the logical AND operator in the definition of the limits of a domain. See screen capture below. Jan 20, 2011 | Texas Instruments TI-84 Plus Calculator

### I had entered an equation into graph mode. I went to the range and tried to change it, I did, and the graph was spread out way too far. I tried to go back into the same place to re-enter the old range, and...

You can reset the calculator. There is a button on the back.
You can also Press ZOOM and select standard STD or auto.
If you want to enter windows dimensions manually, make sure Xmin is less than Xmax, and Ymin is less than Ymax.

Oct 05, 2010 | Casio CFX-9850G Plus Calculator

### No matter what I type into Y= it says err: Window Range

Press the [Zoom] function key and select [6:ZStandard]. The default window dimensions will be restored: to Xmin=-10, Xmax=10, Xscl=1. Ymin=-10, Ymax=10, Yscl=1, Xres=3, DeltaX=0.2127659574

And don't just type anything you want into Y=, make sure that it respects the syntax of the functions, and that you do not set Xmin larger than Xmax, and/or Ymin larger than Ymax.
If any of the dimensions is negative, use the (-) change sign key before the value.

The difference between Xmax and Xmin must be much larger than the DeltaX.

To check the good working order of your calculator always try with a linear function that passes through the origin (0,0). A good example is Y1=X or Y1=2X. If the graph works for these simple functions and does draw with your function then the problem is with your function and not the calculator.

Actually to enable us to offer competent advice you should always say what you were trying to do (the function to draw, the dimension you set). An all encompassing statement such as "No matter what I type" is not helpful at all. All that is left for us to do is guess.

Jun 25, 2010 | Texas Instruments TI-84 Plus Silver...

### Well when i put in the number for Y= then go into the graph it wont show me anything then after half a second it says error and undefined.

Reset the calculator RAM then draw a simple function such as Y1=X.
To reset the RAM:
1. Press [2nd][+] to access the (MEM)ory management
2. Press [7:Reset]
3. [1:All RAM]
4. [2:Reset]

Press [CLEAR] to erase the "RAM Cleared" Message.

• Press [Y=]
• On line Y1=, press the [X,T,theta,n] to type X or press [ALPHA] then the letter that has an X next to it.
• Press [ENTER]
• Presss the [GRAPH] key
You should see a line going through the origin (0,0)

Jun 18, 2010 | Texas Instruments TI-83 Plus Calculator

### How do you type a piecewise function into the TI-84?

Here is an asurd example of a piecewise function
Y1=11 for X less than 10
Y1=3 for X in the range [10, 20[
Y1=X+5 for X in the range [20, 30[
Y1=10 for X larger than 30

Here is the screen capture of the Y= editor window.
You have
1. the definition of the function within a domain, enclosed in () followed by the domain enclosed in ()
2. a + to introduce the second piece (definition) (domain)
3. + a third piece (definition ) (domain)
4. and so on.
5. Use the [2nd][TEST] key sequence to access the relational operators, less than, greater than, etc.
Here are two screen captures for the Y= editor and the resulting graph. Yoy have to play with the window dimension to display a clear graph. Note : 3 pluses in equation, 4 pieces in graph.  Mar 09, 2010 | Texas Instruments TI-84 Plus Calculator

### Just bought this Ti-89 and I can't graph a Diff Eq. I followed the directions from the manual on page 69 and get an error: undefined variable

Even though implied multiplication is accepted generally by the calculator when it involves a number and variable, it leads to errors when it involves two sybmols,
xsin(x) is interpreted as a function called XSIN not X*SIN(X).
Suppose you have a function y1, function of t and you write ty1 the calculator will generate an undefined variable error: It reads ty1 as a variable.To prevent the error message you should write t*y1, showing the multiplication explicitly.
Similarly if you write y1'=0.001y1(100-t) the expression y1(100-t) is interpreted as a function call: the function y1 is called with argument 100-t. If it is what you want you should explicitly express the multiplication and wrtite y1'=0.001y1*(100-t).

Feb 01, 2010 | Texas Instruments TI-89 Calculator

### How to determine function in terms of coordinates

It depends on how complex the function is; there are different techniques. For a straight line of the standard form, usually shown as y=mx+b; this is a simple function of y in terms of x. So, determining the function in this case means finding values for m and b. --- m is the slope of the line, commonly called rise over run. Since your question asks in terms of coordinates, I would assume that you are looking at a problem giving you 2 points.

Probably something like p1 = (3,4); p2 = (5,8); the general form of this is p1=(x1,y1); p2=(x2,y2). The slope in this case is rise over run, in other words, the change in y divided by the change in x. This can be calculate between these two points as (y2-y1)/(x2-x1). In my sample above, this would be (8-4)/(5-3) = 4/2 = 2 giving the value of m.

To find the value of b (the y intercept) you need the value of y when x = 0. Since you already know that m, the slope is 2, consider a new point, call it p3 (x3,y3), pick either of the known points and solve the slope equation again, this time for y3. [m=(y3-y1)/(x3-x1)]. We know that x3 is 0, since we are trying to solve for y where that is true, so the equation becomes:

m=(y3-y1)/(-x1)
-x1*m=y3-y1
y3=y1-x1*m

y3 is really b in the standard form, since it is, by definition the intercept, or the value when x=0,
so
b=y1-x1*m -- this gives you the y intercept anytime you know the slope and one point on the line.

In the example, y1 = 4, x1=3 and we've already calculated m to be 2, so
b=4-3*2 = -2
So, the function would be

y = 2x -2

To check, plug in the values of the other point, p2, and see if they work

y2 = 2*x2 - 2

8=2*5-2

It's easier than it looks. It can help you to understand if you get some old fashioned graph paper and plot it so you can see what is happening.

Jun 16, 2009 | Computers & Internet

### I can't find how to graph absolute value function.

Hello,
Here how you do it taking as exemples y1=x^3 -5 and y2=abs(x^3-5)
Turn calculator ON by pressing [AC/On] . Use arrows to select [Graph] icon and press [EXE]
On line Y1= enter X[^]3 -5 [EXE]
On line Y2= press [OPTN] [F5:NUM][F1:abs] [(] X [^]3 -5 [)] [EXE]
The graphs will be drawn one after the other. You might have to adjust the window limits.
Here is an ouput drawn on another calculator. For negative values of the x-variable, Y1 has negative values, while in the same range, Y2 has positive values, equal and opposite to those of Y1. In that range, Y1 and Y2 are symetric of each other with respect to the X axis.
For positive values of the x-variable, Y1 and Y2 are identical.

Hope it helps

Jan 30, 2009 | Casio CFX-9850G Plus Calculator

### Graphing

Hello,

It is actually quite simple. The calculator can perform severa types of graphing, but the most common is the drawing of functions defined by a relation of the form y= fonction(x), or y=f(x) for short.

The procedure is described for the TI 89 Titanium. It is valid for the TI 89 except if I enter the color of a key.
1. Before you start, you should set up the calculator to begin a New Problem. The command for that is accessed through the menus.
Press the [HOME] key to go to main calculator folder.
In Home folder, press [2nd][F1] to access [F6][2:NewProb]. Press [ENTER] to execute the command. Screen should display Done.
2. Press yellow [Diamond] key (it is the equivalent of the CTRL key in computers) then [F1] to open the [Y=] editor.
3. Use the keypad to enter your first function on Y1= line. Press [ENTER] when finished with Y1. This will select the curve to be drawn, and a check mark appears to the left of the Y, in Y1=. If there is no check mark, the curve will not be drawn. If that happens, move cursor on Y1= and highlight it and press ENTER.
4. Enter the next function. Press [ENTER] when finished.

Try the functions Y1=3*x+0.5 and Y2=x^2 -1.

5. Press the yellow [Diamond] key to access [GRAPH]. The cartesian screen appears, the calculator starts graphing. While graphs are being drawn, the indicator BUSY is displayed at the bottom of the screen, on the right.

Here is what your screen looks like. 6. If BUSY indicator disappears, graphs are finished. If nothing is displayed on the screen except the axes, the functions may be out of range. In that case you can adjust the window dimensions. You can change the values of Xmin, Xmax, Ymin, Ymax, or press [F2:Zoom] to use any of the zooming options.

This is the basic procedure to draw y=f(x) graphs.
Hope it helps.

Aug 27, 2008 | Texas Instruments TI-89 Calculator

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