User Manual

Using QuickPlot and Fit Equation
QuickPlot and Fit Equation allows you to drop points on a graph screen and model a
curve to those points using regression functions. You can select color and line style,
draw points on a graph, and choose an equation to fit the drawn points. You can then
store the results of the plot and equation.
QuickPlot and Fit Equation is an option in the … / menu.
Prior to starting the QuickPlot and Fit Equation interactive feature on the graph area,
be sure to set your Background Image Var and other graph settings from the FORMAT
screen. Also set your WINDOW or ZOOM settings.
Drop points on the
screen. Points can be
saved to lists.
Calculate the regression equation,
draw the curve, and store the
function.
Working With Images
The TI-84PlusCE uses both pictures and background images. They are both stored in
Flash archive, but they are used in different ways.
Using Pictures and Backgrounds
• Image Vars (Image1 - Image9, and Image0) are variables stored in archive
memory. An Image Var is used as a Background Image in the graph area. Several
images are pre-loaded on the TI-84PlusCE. You can also convert images to TI-84
Plus CE Image Vars in the TIConnect™ CE software and load them to the calculator.
You cannot create images on the calculator.
Note: TIConnect™ CE software is available as a free download from
education.ti.com/go/download.
• Pic Vars (Pic1 - Pic 9, and Pic0) are also variables stored in archive memory. Pic
Vars can be created by drawing in the graphing area, and the changes saved and
recalled to the graphing area. Saving a Pic Var will not include the Background
Image behind your graphing area.
• Both Image Vars and Pic Vars are stored and run in Flash archive, not in RAM. They
are both accessible in the VARS menu.
• Image Vars and Pic Vars can only be shared with another TI-84PlusCE or TI-84 C
graphing calculator.
• TI-84 Plus Pic Vars cannot be shared between the TI-84 Plus and the TI-84 PlusCE
graphing calculators.
• If you perform a RAM reset on the TI-84 PlusCE, the Image Vars and Pic Vars
remain in Archive memory for use.
Working with Graphs 37