TI-85

To Enter Points:

STAT, F2 EDIT. ENTER twice. Enter in each x-value and each y-value. ENTER after each value. QUIT ( 2nd EXIT ) when you are finished.

To Plot Points:

STAT, F3 DRAW. F2 SCAT (scatter plot).

To Turn off Stat Plot:

STAT, F3 DRAW, F5 CLDRW (Clear Draw).

Regression

To Find the Regression Equation:

STAT, F1 CALC. ENTER twice. Use LINR for linear regression, P2REG for quadratic regression, P3REG for cubic regression, and so on. (Note: LINR returns the numbers a and b for y=a+bx.)

To Graph the Regression Equation:

GRAPH, F1 y(x)=, STAT, F5 VARS, MORE twice, F2 RegEq. Then EXIT twice and F5 GRAPH.

Note: You may have to change the window (GRAPH, F2 RANGE) in order to see all of the points on the viewing screen.

Mark Wilson-Instructor

SJRCC

Revised: 8/03