CWU Statistics Pre-Test

The linear equation y=1/2x+20 represents how many television viewers of the World Cup there were in the years 2010, 2014, 2018, and 2022. Choose the correct slope and y-intercept.

• Slope: 1/2

• Slope: -1/2

• Slope:-20

• y-intercept: 1/2

• y-intercept: 20

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CCSS.MATH.CONTENT.8.SP.A.3

The World Cup is the largest men’s soccer tournament on Earth. Angel plans on going to the upcoming 2026 final game. He found data on different factors for soccer teams in the World Cup finals. Please answer the following questions to help Angel analyze the trends of the World Cup finals from previous years.

If Angel decided to plot all the points from the table below on a graph, what type of graph would best show the association between the data?

• 
• 
• 
• 

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CCSS.MATH.CONTENT.8.SP.A.1

Based on the graph, what could Angel expect the number of viewers to look like in 2026 (Based on the line of best fit)?

• Between 2000 and 2200 

• Between 1500 and 1600

• Between 1400 and 1500

• Between 1800 and 2000

• Not Enough Information

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CCSS.MATH.CONTENT.8.SP.A.2

The Average # of Fouls and Games Won are listed as a coordinate pair, (Fouls, Games). Given the following data graph the points and describe the association between the two quantities: (2,16) (4,17) (15,5) (10,5) (11,11) (6,13) (13,8) (14,13) (10,14) (22,2) (19,6)

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CCSS.MATH.CONTENT.8.SP.A.1

Match the following:

• No Association

• 
• Positive Linear Association

• 
• Negative Linear Association

• 
• Stronger Positive Linear Association

• 
• Non Linear Association

• 

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CCSS.MATH.CONTENT.8.SP.A.1

Given the data on the graph fit a line that represents the association of the data.

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CCSS.MATH.CONTENT.8.SP.A.2

Circle and describe the association of the data, specifically show the data clustering and outliers of the data.

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CCSS.MATH.CONTENT.8.SP.A.1

How useful would the line of best fit be for this scatter plot to make prediction given the association?

• Not useful at all, since the data is not linearly correlated enough to apply a line of best fit.

• Not useful at all, since their are outliers to the data set

• Possibly useful, as there is a linear pattern but the association is not very strong and has outliers

• Very useful, as there is a linear pattern and the association is very strong but has outliers

• Predictions will be accurate, as there is a linear pattern and the negative association is very strong

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CCSS.MATH.CONTENT.8.SP.A.2

Based on the scatter plot of child's height to weight, which of the following could be the line used to predict the weight of a child based on the height?

• y= 10x +10

• y= 5/8x +15

• y=x+20

• y=15x+1

• y= 3/4x +10

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CCSS.MATH.CONTENT.8.SP.A.2

CCSS.MATH.CONTENT.8.SP.A.3

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? Choose ALL correct answers

• Negative Linear Association:

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

• Positive Linear Association:

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

• The y-intercept represents a students grade of 0% if they have read 0 books 

• No Association:

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

• The slope of the line is the grade increase % divided by the amount of books read

Tags

CCSS.MATH.CONTENT.8.SP.A.1

CCSS.MATH.CONTENT.8.SP.A.3