1. TI Calculator Creating a Scatterplot … Step #1 – Enter the Data
STAT
1 (Edit)
To clear the lists …
press up arrow,
CLEAR, and
ENTER
Enter your data into the Lists
Important:
Must have same number of items in each list!

2. TI Calculator Step #2 - Display the Graph 2nd Y= Turn Plot 1 ON
Possible Source of Errors:
Mismatched Data
L1 and L2 not showing
Other StatPlots are ON
Step #2 - Display the Graph
2nd Y=
Turn Plot 1 ON 1
Enter
Make sure it shows L1 and L2
Make sure all other plots are OFF (2nd, Y=)
GRAPH
ZOOM, 9 automatically adjusts the window to fit the data entered into the Lists

3. TI Calculator LinReg(ax+b) L1, L2, Y1
Step #3 - Getting the Line of Best Fit
STAT
 (right arrow – over to CALC)
4 (LinReg)
2nd, 1 (will show L1) ,
2nd, 2 (will show L2)
VARS
 (right arrow – over to Y-VARS)
1 (Function)
1 (Y1)
ENTER
Possible Source of Errors:
Could be missing commas.
Whole command should be the only thing on the line (on the calculator).
LinReg(ax+b) L1, L2, Y1

4. T1 Calculator
This gives you the equation of the line of best fit and stores it in Y1
y = ax + b
a =
b = 62.75
r2 =
r =
If you don’t get the r values:
2nd
Scroll Down to Diagnostic On
ENTER
y = x
Press GRAPH to see the scatterplot with the line of best fit!