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The Power of Information

Using Technology & Lines of Best FitI 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)

Press Menu analyze regression show linear (mx + b)15

Summary:New documentLists and spreadsheets (to enter data)HomeGraph button (picture of bar graph)Add labels to x and y axesMenu Analyze Regression Show Linear (mx + b)To get equation of line of best fit

More PracticeDaily high temp (C)Peak electricity demand (MW)2419 5032318 8322419 1502720 6132921 5443022 2372620 0822921 8193223 4883424 950Find equation. Power outage is likely when usage reaches 27 000 MW. Use equation to determine the likelihood of a power outage when the temp reaches 37 degrees18

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