Operation Manual

Chapter 1: Getting Started with the TI-84 Plus C Silver Edition 24

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. For

details, refer to Chapter 12 in the guidebook.

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.

ENTRY (Last Entry) Storage Area

Using ENTRY (Last Entry)

When you press Í on the home screen to evaluate an expression or execute an instruction, the

expression or instruction is placed in a storage area called ENTRY (last entry). When you turn off the

TI-84 Plus C, ENTRY is retained in memory.

To recall ENTRY, press y [. The last entry is pasted to the current cursor location, where you can

edit and execute it. On the home screen or in an editor, the current line is cleared and the last entry is

pasted to the line.

Because the TI-84 Plus C updates ENTRY only when you press Í, you can recall the previous entry

even if you have begun to enter the next expression.

Note: You can also scroll up through previous entries and answers on the home screen, even if you

have cleared the screen. When you find an entry or answer that you want to use, you can select it and

paste it (press Í) on the current entry line. List and matrix answers cannot be copied and pasted to

the new entry line.

For more information on copying and pasting previous entries, see Scrolling Through Previous Entries

on the Home Screen earlier in this chapter.

Clearing ENTRY

Clear Entries (Chapter 18 in the guidebook) clears all data that the TI-84 Plus C is holding in the ENTRY

storage area, and clears the home screen history.

Drop points

on the

screen.

Points can be

saved to lists.

Calculate the

regression

equation, draw

the curve, and

store the

function.

5 Ã 7

y [