Scatter Plots and Line of Best Fit Review

Label they type of association:

About how many male math teachers were there in 2006?

Hector surveyed 500 people and asked them how far they drive to work and what the last digit of their phone number is. He used the results to make a scatter plot. What type of association should he expect to see in the scatter plot?

• Positive Association

• Negative Association

• No Association

What type of correlation does this graph have?

• positive

• negative

• none

• all of the above

The scatter plot below shows the number of books read by students in Mrs. Hall’s English class and their final grades. Which statement represents the best description about the line of best fit?

• The more books students read, the lower their English grade.

• The more books students read, the higher their English grade.

• The fewer books students read, the higher their English grade. 

• No relationship exists between the number of books students read and their English grades. 

Which of the following could be a possible line of best fit for the data?

• y = -5/2x + 20

• y = -x + 19

• y = x + 20

• y = 2/3x + 15 

The table shows the height of a tree for various years after it was planted. Calculate the line of best fit where x = age and y = height.

• y = .89x - 3.42

• y = .96x + 8.47

• y = .78x + 5.35

• y = .56x + 6.23

The line of best fit for the height of a tree for years after it was planted is y = .96x + 8.47

Predict the age of the tree if it is 44 feet tall. (height = y, age = x)

• 35 years old

• 36 years old

• 37 years old

• 38 years old

What type of correlation does this scatter plot represent?

• positive linear association

• negative linear association

• no association

• nonlinear association

The table shown is comparing a person's foot length to their height in cm. Calculate a line of best fit.

• f(x) = 25.05x + 5.57

• f(x) = 5.57x + 25.05

• f(x) = -5.57x + 25.05

• f(x) = 5.57x - 25.05