Castle Learning Reference

Calculator Tips for Pre-Calculus

Regressions

The following instructions apply to a TI83 or TI84 graphing calculator.

First enter the 'x' values into List 1 and the 'y' values into List 2.
To get to List 1 and List 2, use the following key strokes:

stat
enter at 'edit'
You should see the following screen:

**If there are numbers in the lists, clear the lists before inputting any other values.

Now enter the information into List 1 and List 2. Below is just an example:

Follow the key strokes below to find the type of regression the problem is asking for.

'stat' key
right arrow over to 'calc'
For a linear regression, hit '4'
For a quadratic equation, hit '5'
For an exponential function, hit '0'
For a power regression, hit 'A'

**These are the most common regressions. The example shows a linear regression (hit '4'). Below is the screen you will see.
Hit enter.

This is the information for the linear regression equation and correlation coefficient.

**If you do not see 'r' and 'r²', on your screen you need to turn on diagnostics.
The instructions for 'diagnostic on' can be found in the catalog of the calculator.