Calculator Keystrokes
Linear Regression Notes
Linear Quadratic Exponential
Calculator Keystrokes
Before you begin, clear the memory on your calculator by pressing 2nd, +, 7, 1, 2
Turn on the Diagnostic by pressing 2nd, 0, X-1, arrow down to DiagnosticOn and press ENTER, ENTER, CLEAR
Given a Table and No Equation
Step 1: Press STAT, 1
List the x-values in L1 and the y-values in L2
(Note: each time you enter your table into L1 and L2 after the first time, you will have to clear the data that is already there. Arrow up to highlight L1 or L2 and press CLEAR, ENTER)
Step 2: Press Y=
Clear any equation in Y1
Arrow up once to highlight Plot 1
Press ENTER to turn on Plot 1
Step 3: Press STAT
Arrow right to move to CALC
Select choice 4 for Linear, 5 for Quadratic, or 0 for Exponential
Press ENTER
Step 4: Record your equation for the line or curve of best fit and the correlation coefficient or r value
Step 5: Press Y= and enter your equation in Y1
Step 6: Press ZOOM 9 to view your Stat Plot and line or curve of best fit
Step 7: Press 2nd MODE to return to the main screen
Press VARS, arrow right to Y-VARS
Press 1, 1 and open the parenthesis
Type the independent value (x) you are using to predict the outcome
Press ENTER
Record your prediction
Congratulations!
Now let’s try some….
Example 1: The table below shows the year and population (in millions) of Texas. Sketch the scatterplot, determine the appropriate regression to use (quadratic, exponential, or linear), and find the equation of the regression line.
Regression Type:
___________________________
Equation:
___________________________
Example 2: The table below shows the balance of Marissa’s bank account at the end of each year. Sketch the scatterplot, determine the appropriate regression to use (quadratic, exponential, or linear), and find the equation of the regression line.
Regression Type:
___________________________
Equation:
___________________________
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To find the “r”
To enter the given lists
To turn the “plots” on so it will graph
To get the equation and “r”
To see the graph of the “line of best fit”
To help you see the plots on the graph
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