QUIZ: Scatter Plots and Lines of Fit

• A

• B

• C

• D

What is the correlation coefficient? (Round to the nearest hundredth.)

If he uses the point (2, 8) and (5, 1.5) from his line, which equation would best represent the line of best fit?

• A.) y= -2.17 + 12.3

• B.) y = 2.17x + 3.77

• c.) y = -0.46x + 9

• D.) y = -2.17x - 9.35

Which of the two given points would be the best to use to calculate the line of best fit?

• A.) (500, 11) and (700, 11)

• B.) (300, 9) and (400, 7)

• C.) (400, 0) and (500, 11)

• D.) (300, 7) and (600, 10)

• A

• B

• C

• D

Which graph represents the correlation of its given situation correctly?

• A

• B

• C

• D

Using the equation y = 27x + 751 for the line of best fit, and where x is the years since 1996. Which is a good prediction for the number of powerboats registrations in 2015? ( Type only the number)

Which is the correct equation for the line of best fit?

• A.) y = 1.4x + 55

• B.) y = 1.4x - 84

• C.) y = 0.72x + 60

• D.) y = 0.72x + 56

Using the line of best fit, predict the average consumption of bottled water in the year 2000.

• A.) 20 gallons

• B.) 18 gallons

• C.) 19 gallons

What is the correlation coefficient? (Round to the nearest hundredths. Type only the number.)