Line or Curve of Best Fit

The table shows the height of a tree for various years after it was planted. Using the line of best fit, how tall would the tree be 30 years after it was planted?

• 22 feet

• 23 feet

• 36 feet

• 37 feet

The table shows the height of a tree for various years after it was planted. Using x = age, what is the slope of the line of best fit?

• 0.94

• 0.96

• -6.77

• 8.47

Caroline weighs her new puppy every month to see how much it has grown. Is this data best represented by a line or curve?

• Line

• Curve

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

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. Is this data best represented by a line or curve?

• Line

• Curve

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 height a toy rocket is above the ground is recorded for several times after it was launched. Approximately how long after it is launched does the rocket reach its maximum height?

• 4 seconds

• 5 seconds

• 6 seconds

• 10 seconds

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

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