# TI-82: Correlation / Regression

See the instructions on using the calculator to do statistics and lists. This provides an overview as
well as some helpful advice for working with statistics on the calculator.

## Calculating Values

- Enter the data. Put the x-values into list 1 and the y-values into list 2.
- Go into the Stats, Calc, Setup screen
- Setup the 2-Var Stats so that: Xlist = L
_{1}, Ylist = L_{2}, Freq = 1
- Calculate the Linear Regression (ax+b) (#5)

This screen will give you the sample linear correlation coefficient, r; the slope of the regression
equation, a; and the y-intercept of the regression equation, b.

Just record the value of r.

To write the regression equation, replace the values of a and b into the equation
"y-hat = ax+b".

To find the coefficient of determination, square r. You can find the variable r under VARS,
STATS, EQ, r (#6).