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Getting Started 35
Note: If you would like to add the regression line to a scatter plot,
adding Y1 to the end of the instruction: LinReg(ax+b) L1, L2, Y1. (Press
~ Í Í to add Y1.) Press s to see the regression line.
Calculating a linear regression
If you wish to calculate the linear regression for data, you can do so using
the
LinReg instruction from the … CALC menu.
Example: Calculate the linear regression for the data entered in L1 and
L2.
Note: The information on the last screen means that the points in L1 and
L2 [(1,5) (2,6) (3,7) (4,8)] all lie on the line Y = X + 4.
Press Result
… ~ † † †
Í
y d ¢ y e
Í