The linear correlation coefficient works with data sets or lists and compares how those lists relate to each other on a scale from -1 to 1. A higher coefficient rating means the two variables have a stronger relationship, with the value of one indicating that the variables grow at a one-to-one rate. Use the TI-84 graphing calculator to calculate the linear correlation coefficient of two lists of data.

## Step 1

Press the "2nd" key at the top of the keypad, and then press the "0" key. A list of functions appears on the calculator's screen.

## Step 2

Scroll down the options on the screen with the down-arrow key on the joystick keypad in the top right corner. Stop scrolling when "DiaGnosticOn" is highlighted. Press the "Enter" key twice.

## Step 3

Press the "Stat" key and then press the "Enter" key. Empty columns with the headings "L1," "L2" and "L3" display on screen with the "L1" field highlighted.

## Step 4

Enter the first value from the first list into the "L1" column by keying the value. Press the down-arrow key to advance to the next spot underneath. Move to the top of the second column using the up and right arrow keys. Enter the values of the second list the same way.

## Step 5

Press the "Stat" key. Press the right-arrow key to move to the "Calc" heading.

## Step 6

Scroll down to the "LinReg" option using and press the "Enter" key. The "r" variable displayed on the screen is the correlation coefficient.