Line and Curve

Caroline weighs her new puppy every month to see how much it has grown. If age is a and weight is W, which of these is the correct equation of best fit?

• W = 3.6 + 8.9

• W = 3.6a + 8.9

• a = 8.9W + 3.6

• W = 8.9a + 3.6

The height a toy rocket is above the ground is recorded for several times after it was launched. What is the coefficient of x² in the curve of best fit equation?

• -5.43

• 5.43

• 54.81

• -2.43

The table shows how much money Jon has in his bank account each year. Is this data better represented by a line or a curve?

• Line

• Curve

Tags

CCSS.8.F.A.3

The table shows how much money Jon has in his bank account each year. Use the equation of best fit to estimate how much was in his account 18 years after he opened it.

• -$2,560

• $1,315

• $1,608

• $2,723

Tags

CCSS.HSF.LE.A.2

The table shows the height and shoe sizes of several students. Let x = height and create a line of best fit. What is the y-intercept of that line?

• 1.17

• 0.45

• 55.83

• -19.87

Tags

CCSS.HSF.LE.B.5

The table shows the height and shoe sizes of several students. Use the line of best fit to predict a student's height if they wear a size 7 shoe.

• 35 inches

• 59 inches

• 17 inches

• 63 inches

David is training for a race and records his fastest time after each week of training. Is this data better represented by a line or a curve?

• Line

• Curve

Tags

CCSS.8.F.A.3

David is training for a race and records his fastest time after each week of training. Let t be the weeks David has trained and S be his sprint time. Which of these is the correct curve of best fit for the data?

• S = 0.05t² - 0.66t +32.35

• S = 0.05t - 0.66t +32.35

• S = -0.31t + 32.06

• S = -0.31t² + 32.06

Caroline weighs her new puppy every month to see how much it has grown. Use the equation of best fit to predict how much her puppy will weigh after 1 year.

• 13 pounds

• 52 pounds

• 54 pounds

• 110 pounds

find line of best fit through these points

• y=1.27x+1.62

• y=2x+7

• y=1.7x+8

• y=1.62x + 1.27

Tags

CCSS.8.EE.B.5