How to insert an unknown (x) in an exponential finction in order to graph an exponential function...?? i need an answer please

I am not sure what you mean. Even politicians use the term exponential so it has become blurry.
16=2^4 The power function is related to the exponential.
16=1.6*10^1 Scientific notation. Scientific notation is an exponential display format.
Take your pick.

The function y= 3^x-4^x -1 (3 to the power of x, etc..) is a well-behaved function that should not give you any problem. It is a decreasing exponential (power function). Reset Calculator to defaults and try again. Leave Xscale at 1.

Usually ypu know the equation then graph it. However in doing statistics, it may appear that the curve of best for a scatter plot could be could an exponential. In that case you use the STAT application to enter the x-data in List 1 and the y-data in List 2. When you finish press the f1 key to select Graph1. You should also verify by Pressing F6:set that the graph type is set to scatter, and that List 1 contains the x-data and List 2, the y-data. After you verify that all is in order press the F1: Graph 1 key.
As the graph is displayed you will see several tabs with various regression models. Pan thr tabs to the right to get to F2:EXP. Select it.
The equation is displayed on the next screen. At the bottom of the screen you see two tabs COPY and DRAW. Press f5:Copy to copy the equation in one of the y= functions.
Press Draw and you will see the curve of best fit superposed on the scatter plot points.

Ok, try these two things and you should be just fine.
1.) Check your range for your graph. It is possible that the range you are using isnt large enough to show the curve. Also try using Z-fit vs Z-st. These are options that your calculator will give you once the equation is graphed.
2.) Place a parenthesis around the 2x, make sure that you and the calculator are both using the same order of operations. This move mill ensure that the calculator will multiply the variable, x, by two and then do the exponential.
This should do it!
Happy Graphing!

Here is a solution.


Graph the function over the domain [-Pi,+Pi]
Then press the [SHIFT][MENU] (SETUP) and in option [Dual Screen] select [G to T] Graph to table. The screen will be spilt in two, but the Table part remains empty.
Press [SHIFT][F1] (TRACE), the cross hair appears on screen.
Move it around on the curve
If you press [EXE] at a cross hair location, the table records the X and Y value. On the following screen capture, the exponential function is graphed along with sin(X) and the table is populated by selected values of the exponential.



Now rate all the solutions I provided for you

A. This is due to a mathematical error such as

1. dividing by 0,
   
2. an illogical operation,
   
3. calculations outside the range of a function,
   
4. using the exponential function with the [^] key,
   
5. logarithm of a negative number,
   
6. calculating the factorial of numbers larger that 69,
   
7. what have you.
   
8. Check the expression of the function you are trying to graph.

B. Reset your calculator and start again: Press the button on the back of the calculator; use a starightened paper clip.Draw the line y=XPress Menu.

1. Use keys to highlight [GRAPH] and press [EXE].
2. Make sure the screen that opens says Graph Func Y= at the top.
3. On the Y1= line enter X (use the [X,theta,T] key under the [ALPHA] key.
4. Press [F6:Draw].
5. You should see a staright line passing through the origin (0,0).
   

Hello,
Before starting to graph Y= function, you should Turn STATPLOTS off.
Press [2nd][STATPLOTS] [4:PlotsOff]. command echoes ob screen as PlotsOff . Press [ENTER] to execute it. Calc answers Done.
Press [MODE]
See if Func, (4th line) is already highlighted.
If it is press Y= to start entering the functions.
If it is not highlighted, scroll down to 4th line, then use arrow to highlight Func an press ENTER.

Then press Y= and enter the function. You see that as you enter the function the equal sign becomes highlighted white on dark. Finish entering the sunction and press ENTER. Cursor move to Y=2. Make sure that the equal sign for Y1= is still highlighted. If not, move the cursor on it and press [ENTER].

You can enter the variable X by pressing the [X,T,theta,,n] button to the right of the green [ALPHA] key. Or, alternatively, you press [ALPHA] [STO->] (X).

To graph Press [GRAPH]. If you do not see anything on screen, it may be due to the window dimensions. You can modify the window by pressing the [WINDOW] button.

To test you configuration, I suggest you graph Y1=e^(x) and Y2= ln(x)


You access the exponential e by [2ND] [LN] (e^x) and the natural log by pressing [LN]. In each case you have to enter the right parenthesis.
This what you should get.

If you are not familiar with these function, just enter Y1=X and you will see a staright line passing through the origin (0, 0), just like the one on the following screen capture.



Hope it helps.

Hello,
Before starting to graph Y= function, you should Turn STATPLOTS off.
Press [2nd][STATPLOTS] [4:PlotsOff]. command echoes ob screen as PlotsOff . Press [ENTER] to execute it. Calc answers Done.
Press [MODE]
See if Func, (4th line) is already highlighted.
If it is press Y= to start entering the functions.
If it is not highlighted, scroll down to 4th line, then use arrow to highlight Func an press ENTER.

Then press Y= and enter the function. You see that as you enter the function the equal sign becomes highlighted white on dark. Finish entering the sunction and press ENTER. Cursor move to Y=2. Make sure that the equal sign for Y1= is still highlighted. If not, move the cursor on it and press [ENTER].

You can enter the variable X by pressing the [X,T,theta,,n] button to the right of the green [ALPHA] key. Or, alternatively, you press [ALPHA] [STO->] (X).

To graph Press [GRAPH]. If you do not see anything on screen, it may be due to the window dimensions. You can modify the window by pressing the [WINDOW] button.

To test you configuration, I suggest you graph Y1=e^(x) and Y2= ln(x)


You access the exponential e by [2ND] [LN] (e^x) and the natural log by pressing [LN]. In each case you have to enter the right parenthesis.
This what you should get.

If you are not familiar with these function, just enter Y1=X and you will see a staright line passing through the origin (0, 0), just like the one on the following screen capture.



Hope it helps.

Hello,
Your question puzzled me for a while, and now I understand why tou cannot graph it. I suspect you get a syntax error. (By the way it is extremely helpfull for us to know exactly what message you get).
To draw the exponential you do not use the caret [^] as you would any power. You enter it as Y1= [SHIFT][e] [(] [X, theta, T] [)] . The parentheses seem to be unnecessary but I would enclose the argument of the function in parentheses.
Hope it helps.

Hello,
I am afraid I am missing something here. You can start with the expression of a function and have it graphed on a graphing calculator.
Or you can enter the experimental data, represent them on a graphing calculator and ask the calculator to find the curve that fits the data best, and once that curve is found to give you the equation.
However your calculator does not have the graphing capabilities. All you can do is enter the data and ask the calculator to perform a regression to obtain the expression of the function that fits best.

The available options for the calculator are accessible by pressing [MODE][3:Stat] and
2. A+BX linear
3: _+cX^2 quadratic
4: ln X logarithmic
5: e^X exponential
6:A*B^X power
7: A*X^B Polynomial
8: 1/X

Hope it helps.