Interpreting Line of Best Fit

Which of the following is the equation of the line of best fit? Use points (25, 2500) and (45, 1000) to help you find the slope.

• y = 75x + 4500

• y = -0.5x + 4500

• y = -75x + 4500

• y = -65x + 4500

The equation of this line of best fit is y = -75x + 4500.

Predict how many text messages a person who is 55 years old would send. (HINT: PLUG IN 55 for x into the equation)

• 375

• 400

• 425

• 450

Tags

CCSS.HSF.LE.B.5

What is the equation of the line of best fit shown? Use points (1, 40) and (4.5, 25) to help you find the slope.

• y = -5x + 44

• y = -4.29x + 44

• y = 4.29x + 44

• y = -0.5x + 44

The equation of the line of best fit shown is y = -4.29x + 44. Using this equation of the line of best fit, make a conjecture about the gas mileage of a car if it weighs 5.5 tons.

• 22. 22.2 mpg

• 24.8 mpg

• 18.6 mpg

• 20.4 mpg

What is the equation of the line of best fit shown? Use points (10, 2) and (80, 16)

• y = 0.6x

• y = 0.2x

• y = 1x

• y = 0.8x

Tags

CCSS.8.EE.B.5

What is the equation of the line of best fit shown? Use points (20, 50) and (50, 80) to help you.

• y = 0.5x + 30

• y = -1x + 30

• y = 2x + 50

• y = 1x + 30

What is the equation of the line of best fit shown? Use points (40, 40) and (70, 0) to help you.

• y = -0.8x + 90

• y = 0.8x + 90

• y = 1.33x + 90

• y = -1.33x + 90

Based on the trend of the data, what is most likely to be the number of calories burnt by a person who runs for 20 minutes?

• 100 calories

• 123 calories

• 10 calories

• 172 calories

Based on the trend of the data, what is most likely to be the number of minutes spent on a treadmill by a person who burns 150 calories?

• 10 minutes

• 15 minutes

• 20 minutes

• 25 minutes

Based on the trend of the data, what is most likely the average number of customers who would purchase a $8 meal from the restaurant chain?

• 9 people

• 26 people

• 68 people

• 94 people