TEKS 8.5D Using Trendlines to Make Predictions

The following scatter plot shows Pam's training as she prepares to run a 6 mile race at the end of the month. Which of the following would be a reasonable approximation for the length of time it would take for her to run 6 miles?

• 50 min

• 80 min

• 45 min

• 60 min

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CCSS.8.SP.A.1

CCSS.8.SP.A.2

CCSS.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.8.F.B.4

CCSS.8.SP.A.1

CCSS.8.SP.A.2

CCSS.8.SP.A.3

Which graph shows an accurate trend line for the scatter plot?

• Graph A

• Graph B

• Graph C

• Graph D

Tags

CCSS.8.EE.B.5

Based on the trend line for the scatter plot, which of the following amounts is closest to the cost of a 120-minute phone call?

• $10

• $12

• $15

• $20

Tags

CCSS.8.SP.A.1

CCSS.8.SP.A.2

CCSS.8.SP.A.3

If the carpenter worked for 6 days, what would be the best prediction of his earnings?

• $1250

• $1500

• $1750

• $2000

Tags

CCSS.8.EE.B.5

CCSS.8.F.A.3

CCSS.8.F.B.4

CCSS.8.SP.A.2

CCSS.8.SP.A.3

Make a prediction for a resting heart rate after 6 hours of exercise a week.

• 6
• 50
• 55
• 59

Tags

CCSS.8.F.B.4

CCSS.8.SP.A.1

CCSS.8.SP.A.2

CCSS.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

Tags

CCSS.8.F.A.3

CCSS.8.F.B.4

CCSS.8.F.B.5

CCSS.8.SP.A.1

CCSS.8.SP.A.2

CCSS.8.SP.A.3

The scatter plot shows the average number of hours of 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 scatter plot, 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?

• 33 hours

• 50 hours

• 65 hours

• 85 hours

Tags

CCSS.8.F.B.4

CCSS.8.SP.A.1

CCSS.8.SP.A.2

CCSS.8.SP.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 scatter plot shows the data she recorded.

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

• $135

• $115

• $105

• $150

Tags

CCSS.8.SP.A.1

CCSS.8.SP.A.2

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

Based on the scatter plot, what is the best prediction of the average amount of money spent on groceries of a household of people?

• $240

• $190

• $210

• $300

Tags

CCSS.8.F.B.4

CCSS.8.F.B.5

CCSS.8.SP.A.1

CCSS.8.SP.A.2

CCSS.8.SP.A.3