CCSS.Math.Content.8.SP.A.3

Associations that are in a straight line are called _____.

• Linear
• Non-linear
• Curved
• Straight

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CCSS.Math.Content.8.SP.A.3

About how many male math teachers were there in 2006?

• 15
• 30
• 35
• 45

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CCSS.Math.Content.8.SP.A.3

The scatter plot shows the relationship between the number of chapters and the total number of pages for several books.  Use the trend line to predict how many chapters would be in a book with 140 pages. 

• 12 chapters
• 19 chapters
• 14 chapters
• 21 chapters

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CCSS.Math.Content.8.SP.A.3

The scatter plot shows the relationship between the number of chapters and the total number of pages for several books.  Use the trend line to predict how many chapters would be in a book with 180 pages. 

• 12 chapters
• 15 chapters
• 18 chapters
• 21 chapters

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CCSS.Math.Content.8.SP.A.3

If the debate team practiced for only 1 hour, how many debates are they expected to win?

• 2
• 6
• 10
• 14

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CCSS.Math.Content.8.SP.A.3

The linear regression equation is y = 61.93x - 1.79.  According to the model, the slope can be interpreted as:

• After 0 hours of driving, they went 61.93 miles.
• They drove at a speed of 61.93 miles per hour.
• They drove 61.93 miles total.
• They drove 61.93 hours total.

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CCSS.Math.Content.8.SP.A.3

Write an equation for the given scatter plot.

• y=2x+8

• y=1x

• 8x-4y=10

• y=7

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CCSS.Math.Content.8.SP.A.3

Joe works at the ABC Company. The scatter plot shows the number of hours Joe worked and the amount he earned over a span of several pay periods.

Based on the graph, what is the best prediction of the amount Joe would earn if he works 55 hours?

• $700

• $900

• $600

• $800

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CCSS.Math.Content.8.SP.A.3

Students in a science class investigated how the speed of sound changes with the air temperature outside. The data are shown in the scatterplot.

Based on the scatterplot, what is the best prediction of the speed of sound when the air temperature is  $50\degree C$  ?

• 350 m/s

• 355 m/s

• 360 m/s

• 365 m/s

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CCSS.Math.Content.8.SP.A.3

The scatterplot shows the number of people in each of 8 different households and the average amount of money each household spent on groceries.

Based on the scatterplot, what is the best prediction of the average amount of money spent on groceries for a household that has 7 people?

• $240

• $190

• $210

• $300

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CCSS.Math.Content.8.SP.A.3