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8th Grade Margin Of Error Quizzes , Questions & Answers

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8th Grade

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Section 6.2 - Lines Of Best Fit

Explore linear relationships in various contexts using scatter plots to determine lines of best fit, predict values, and analyze data trends.

Questions: 10 | Attempts: 1064 | Last updated: Aug 18, 2025

Sample Question 1
This scatter plot shows the annual profits for the past ten years for Ellen's business designing greeting cards. Use the graph to estimate the profit in the 9th year.

$12 500

$13 200

$13 500

$14 000

Sample Question 2
This scatter plot shows daily low temperature s in Banff National Park for the first ten days of July. What is the equation for the line of best fit?

Y = x + 4

Y = 7/3x + 2/3

Y = 7/3x + 16/3

Y = x + 2

Sample Question 3
The scatter plot shows the fuel consumption for vehicles of various weights. Use the graph to estimate the weight of a car that consumes fuel at a rate of 5L / 100km.

1.0 tonne

1.06 tonnes

1.1 tonnes

1.6 tonnes

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