STEP 1—General Set-up - only do at the beginning – not necessary to do each
time
Press 2nd 0 to get the (CATALOG)
x1−
Scroll to find DiagnosticOn
ENTER
ENTER
Press Y=
Y1= is empty
Plot 1 is highlighted
STEP 2—Entering Data/Viewing Graph
Press STAT
Select 1: Edit
(enter data into L1 and L2)
Press ZOOM
Select 9: ZoomStat
**determine based on graph shape which regression to run
STEP 3—Equation
Press STAT
Select CALC (based on the shape of your graph, choose which
regression curve to select)
4: LinReg (ax+b)
5:QuadReg
9:LnReg
0:ExpReg
Arrow down to StoreRegEq:
Press VARS
Select Y-VARS
Select 1:Function
Select 1:Y1
Press ENTER
**The line of best fit should now be stored in your
Y=, Y1, allowing you to use your table to find data
points. Press Y= to ensure formula is there. On the TI83, you may have to enter the formula manually. Just
use the a, b, and c values to enter the equation.
Now use the 2nd CALC to find MIN, MAX information