Correlations

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. 

Tags

CCSS.8.EE.B.5

Which scatterplot suggests a linear association?

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• 
• 
• 

Which of the following best describes this correlation?

• Positive, Strong

• Negative Strong

• Positive Weak

• Negative Weak

Which of the following variables is used to represent the correlation?

• C

• n

• S_x

• r

What is the direction of the scatter plot?

• Positive Association

• Negative Association

• None

• Linear

Approximate the correlation of the scatter plot.

• r = 0

• r = 0.4

• r = -0.4

• r = 0.7

r = 0.47. What is the strength of the correlation?

• Strong

• Weak

• Moderate

• None

r = 0.599. What is the strength of the correlation?

• Strong

• Weak

• Moderate

• None

What does r² tell us?

• How big the correlation is

• How strong the correlation is

• How much the x variable affects the y variable

• How much the y variable affects the x variable

The linear regression equation is y = 61.93x - 1.79. Use the equation to predict how far this person will travel after 10 hours of driving.

• 100

• 730.15

• 617.5

• 500

Tags

CCSS.8.EE.C.8C