Using Technology & Lines of Best Fit

I can construct graphs and lines of best fit using a graphing calculator.

Go to page 45, Example 2 in the textbook

Click ENTER on the cell, then add type in your data

Click ENTER to go to the cell below

Enter in your data

Click the HOME/ON button

Scroll the cursor to the bottom (x-axis), click and select the variable for the x-axis

Scroll the cursor to the left side (y-axis), click and select the variable for the y-axis

Click MENU, Analyze, Add Movable Line

Click MENU, Analyze, Regression, Show Linear (mx+b)

Summary:

New document

Lists and spreadsheets (to enter data)

Home

Graph button (picture of bar graph)

Add labels to x and y axes

Menu Analyze Regression Show Linear (mx + b) To get equation of line of best fit

More Practice

Daily high temp (°C) Peak electricity demand (MW)

24 19 503

23 18 832

24 19 150

27 20 613

29 21 544

30 22 237

26 20 082

29 21 819

32 23 488

34 24 950