Scatterplots and Writing Linear Equations

Phil collected data from several of his friends about the number of hours they spent sleeping and the number of hours they spent playing video games on Saturday. He recorded the data in the scatterplot.

Based on the scatterplot, what is the best prediction of the number of hours one of Phil's friends spends sleeping when the friend spends 1 hour playing video games?

• 9 hours

• 11 hours

• 7 hours

• 8 hours

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

Based on the scatterplot, what is the best prediction of the speed of sound when the air temperate is 50 degrees C?

• 350 m/s

• 362 m/s

• 358 m/s

• 348 m/s

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

• $285

Which scatterplot suggests a linear relationship between x and y?

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Tags

CCSS.8.F.A.3

Ben collected data from a group of 12 people. He measured each person's resting heart rate and recorded the average number of hours each person exercised per week. He created a scatterplot to show the data he collected.

Based on the scatterplot, what is the best prediction of the resting heart rate, in beats per minute, of a person who exercises an average of 8 hours per week?

• 30 beats per minute

• 50 beats per minute

• 58 beats per minute

• 40 beats per minute

The scatterplot shows the average number of hours each of 13 people spends at work every week and the average number of hours each of them spends on recreational activities every week.

Based on the scatterplot, what is the best prediction of the average number of hours a person spends at work every week if that person spends an average of 10 hours on recreational activities each week?

• 34 h

• 78 h

• 55 h

• 65 h

Which scatterplot suggests a linear relationship between x and y?

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• 

Tags

CCSS.8.F.A.3

The manager of a restaurant recorded how many people were in different groups of customers and how much those groups spent on food and beverages. The scatterplot below shows the data she recorded.

Based on this scatterplot, about how much money would a group of 10 people be expected to spend on food and beverages at this restaurant?

• $135

• $119

• $105

• $147

Tags

CCSS.8.F.B.4

CCSS.HSF.IF.B.6

Which scatterplot does NOT suggest a linear relationship between x and y?

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Tags

CCSS.8.F.A.3

Mrs. Collins made a scatterplot to show the relationship between the number of absences a student in her class has and the student's final exam score.

Based on this scatterplot, approximately what score should a student with 6 absences expect to receive on the final exam?

• 67

• 86

• 11

• 76