Section 6.2 - Lines Of Best Fit

10 Questions | By Seixeiroda | Last updated: Oct 31, 2022 | Total Attempts: 905

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Complete the following questions

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1.

This scatter plot shows the annual profits for the past ten years for Ellen's business designing greeting cards. Use the graph to estimate the profit in the 9th year.
- A.
  
  $12 500
- B.
  
  $13 200
- C.
  
  $13 500
- D.
  
  $14 000
2.

This scatter plot shows daily low temperature s in Banff National Park for the first ten days of July. What is the equation for the line of best fit?
- A.
  
  Y = x + 4
- B.
  
  Y = 7/3x + 2/3
- C.
  
  Y = 7/3x + 16/3
- D.
  
  Y = x + 2
3.

The scatter plot shows the fuel consumption for vehicles of various weights. Use the graph to estimate the weight of a car that consumes fuel at a rate of 5L / 100km.
- A.
  
  1.0 tonne
- B.
  
  1.06 tonnes
- C.
  
  1.1 tonnes
- D.
  
  1.6 tonnes
4.

The following data show the video game rankings of two students, from least favorite (1) to most favorite (10). Which is the equation for the line of best fit?
- A.
  
  Y = -0.75x + 9.75
- B.
  
  Y = 0.75x + 8.25
- C.
  
  Y = 0.75x + 9.75
- D.
  
  Y = -0.75x + 8.25
5.

The table shows the Olympic gold medal performance in high jump from 1948-1980. Which shows a line of best fit for the data?
- A.
  
  Graph a
- B.
  
  Graph b
- C.
  
  Graph c
- D.
  
  Graph d
6.

The table and scatter plot show the mean heights of children in Kalama, Egypt, a village where nutrition is being studied. What is an equation for the line of best fit?
- A.
  
  Y = 0.15x + 74.15
- B.
  
  Y = 0.65x + 64.65
- C.
  
  Y = -0.65x + 89.35
- D.
  
  Y = 0.65x - 31.05
7.

This scatter plot shows average ticket sales for different summer temperatures. Use the graph to estimate the number of tickets sold on a day when it is 35C
- A.
  
  465
- B.
  
  490
- C.
  
  540
- D.
  
  600
8.

The following data shows the price per carat for various weights of loose diamonds. Which two points could you use to determine the equation for the line of best fit?
- A.
  
  (0.3, 1779) and (43, 33 101)
- B.
  
  (0.5, 2813) and (3, 14 021)
- C.
  
  (2, 12 823) and (3, 14 021)
- D.
  
  (0.9, 4929) and (2, 12 823)
9.

The data shows the price and manufacturing time for various bowls. Write the equation you could use to determine the price for a bowl that takes 45 minutes to manufacture.
- A.
  
  45 = 2.7x - 4.8b
- B.
  
  Y = 2.7x - 4.8(45)
- C.
  
  Y = 2.7(45) - 4.8b
- D.
  
  45y = 2.7x - 4.8b
10.

Ananya is member of the school swim team. The average number of laps she swims during practice for various times is shown below. Use a line of best fit to estimate how long it will take Ananya to swim 100 laps.
- A.
  
  52 min
- B.
  
  55 min
- C.
  
  59 min
- D.
  
  160 min