Question about Texas Instruments TI-84 Plus Calculator
When I want to plot an equation and go to the Y= button the plot1 is highlighted and I can't figure out how to unhighlight it.
Posted by Anonymous on
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Posted on Jan 02, 2017
I use one of the graphing APPS or do through a program. I have a users manual for TI 84 silver Edition that shows you how to archive\ unarchive to run programs here at this site. Usually, I tell people to just forget about the programs and use the simple concepts so, that they could operate their calculator better. But, if you notice in those program are actually more powerful than the programs you get on the web, because I wrote them to be flawless, or I only used programs that I knew would not clash and were very well written. Won't y1=(2/5)x-(11/5) and -3x+8 work?
y1=(2/5)x-(11/5) and -3x+8
Posted on Sep 29, 2009
I assume you know how to enter data in your calculator. The keystrokes in the following pertain to TI92/92Plus/ Voyage 200 PLT. The main differences with the TI89/Ti89 Titanium is that the function keys F6,F7,F8 are not accessed directly but by the key sequences [2nd][F1], [2nd][F2], and [2nd][F3] respectively
1. CLEAN THE SLATE (so to speak) and ENTER DATA
In Home folder run F6: NewProb to reset the configuration.
Press Apps, and select 6: data/Matrix editor. Select a new data set
Give it a name: here testing.
Press OK/ENTER, The data entry screen opens, enter your values.
When you finish press F2.PlotSetUp.
2. Statistical plot setup and scatter plot drawing
Press F1:define to configure Plot1. Choose Scatter, then choose a mark for the data point. I select 5:Dot. and press [ENTER
Select the data column X=c1, Y=c2
Press ENTER to save configuration. Press [CTRL] [GRAPH] On my TI92 the CTRL key is the [Diamond] key. On the following graph I changed the mark to a cross to see the data point better. I also played with the window dimension. You can also do that with ZoomStat. The graph remind me of a parabola (I know I chose the exact values)
3. STATISTICAL CALC. AND REGRESSION ANALYSES.
Now we have to find the equation that fits these data best.
You press APPS 6:Data/ Matrix editor but you select current to return to your data set. You are taken to the data entry editor (Figure 3 above). In that screen Press F5:Calc to edit the type of statistics you want
On first line select the type of regression model : Linear Regression, QuadReg quadratic regression (or anything else available) X is from column1, Y is from column 2. Store RegEQ The regression equation in say Y1(x)
Press ENTER to save to get the Regression Equation. Here it is
As you can see I cheated: a perfect parabola. R^2 =1.
And here the best fit represented on same graph as the statistical data
Usually you have to try different regression models, until you find the one that fits best the experimental data.
Posted on Jul 27, 2010
SOURCE: when i click graph it
You're probably trying to graph a function that does not involve stat plot features. You can correct this by turning off the stat plot features. Press "2ND" "STAT PLOT" and then select 4:PlotsOff.
Posted on Sep 06, 2010
Hey. I had the exact same problem as you and all I could do was reset the settings to the default settings on the calculator. All you have to do is turn the calculator on, his 2nd (it should say mem right above it). Then click reset then RAM.
Posted on Sep 30, 2010
SOURCE: i want to graph a
You're trying to graph a function that does not involve stat plot features but the calculator probably thinks you are. You can correct this by turning off the stat plot features. Press "2ND" "STAT PLOT" and then select 4:PlotsOff.
Posted on Oct 29, 2010
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