Lines of Best Fit

Based on the line of best fit, how many pizzas were sold if $260.00 was earned in sales?

• 120

• 160

• 80

• 40

A researcher made the following graph showing the number of hours per day that people spend on the computer versus the number of pounds that they are overweight. Predict the number of pounds overweight someone would be if they spent 8 hours per day using a computer.

• 50

• 45

• 60

• 30

A group of students did an experiment to see how drinking cups of coffee right before bed affected sleep. The results are shown below in the scatter plot with a line of best fit. Use the given line of best fit to approximate the rate of change relative to the scatter plot above.

Tags

CCSS.HSF.LE.B.5

The graph above shows a line of best fit for data collected on the distance bicyclists have remaining in relation to the amount of time they have been riding. What is the equation of the line of best fit?

• y = 25x + 170

• y = -25x + 170

Tags

CCSS.HSF.LE.B.5

Based on the line of best fit, what is the mileage of a 9-year-old car?

• 67,500 miles

• 180,000 miles

• 135,000 miles

• 90,000 miles

A small theme park is trying to determine the number of guests they should expect on a weekend, based on the temperature outside. Based on the trend line, about how many guests should be expected if the temperature is around 90°F?

• 9,900

• 9

• 8,200

• 9,200

Based on the line of best fit, how many pizzas were sold if $97.50 was earned in sales?

• 15

• 30

• 45

• 60

Looking at the graph above showing a line of best fit, what is the correlation between the x and y variables?

• y decreases as x decreases

• y is constant

• y decreases as x increases

• y increases as x increases

A teacher made the following graph showing the number of hours that a student studied for an exam versus their exam grade. Predict the grade of a student if they studied for 3.5 hours.

• 80

• 95

• 90

• 100

Which scatterplot most likely has a line of best fit represented by y = 2x + 1?

• A. W

• B. Y

• C. X

• D. Z

Tags

CCSS.8.EE.B.5