MTH 98 Addendum
Finding the Equation of Best Fit (with the TI-84 Plus)
I.
To Edit lists L1 and L2, press
.
II.
Enter the x-values under L1.
III.
Press
IV.
Turn on Plot1 by pressing
V.
Press
VI.
Use Zoom Stat to automatically select a graphing window for these points. This is option 9 in the
to access L2. Enter the y-values under L2.
. Set up the menu as shown here:
and check to see that the Y= screen is blank. Note PLOT1 is now turned on.
menu.
VII.
Select the LinReg, QuadReg, or ExpReg in the STAT-CALC menu by pressing
then 4, 5, or 0 .
VIII.
Press
to calculate the equation of best fit.
IX.
Press
and enter the equation of the line of best fit as shown.
X.
Use Zoom Stat --- option 9 in the
the line of best fit.
,
menu --- to display the data points along with the graph of
Instructions for finding mean and standard deviation with the TI-84 Plus
Formula
ME = 2
pˆ (1 − pˆ )
n