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Unit 6 - Lesson 3 - Grade 8: Illustrative Mathematics

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16 Questions
Note from the author:
Grade 8 Unit 6
Lesson 3: What a Point in a Scatter Plot Means
CC BY 2021 Illustrative Mathematics®
Grade 8 Unit 6
Lesson 3: What a Point in a Scatter Plot Means
CC BY 2021 Illustrative Mathematics®
Lesson: What a Point in a Scatter Plot Means

The Giant Panda (Warm Up)

1.

A giant panda lives in a zoo. What does the point on the graph tell you about the panda?

Weight and Fuel Efficiency

The table and scatter plot show weights and fuel efficiencies of 18 cars.


2.

Which point in the scatter plot represents Car L’s measurements?

3.

What is the fuel efficiency of the car with the greatest weight?

4.

What is the weight of the car with the greatest fuel efficiency?

5.

Car S weighs 1,912 kilograms and gets 16 miles per gallon. On the scatter plot, plot a point that represents Car S’s
measurements.

6.

Cars N and O, shown in the scatter plot, are made by the same company. Compare their weights and fuel efficiencies. Does anything surprise you about these cars?

7.

A different company makes Cars F and G. Compare their weights and fuel efficiencies. Does anything surprise you about these cars?

Coat Sales

A clothing store keeps track of the average monthly temperature in degrees Celsius and coat sales in dollars.

8.

What does the point (15, 680) represent?

9.

For the month with the lowest average temperature, estimate the total amount made from coat sales. Explain how you used the table to find this information.

10.

For the month with the smallest coat sales, estimate the average monthly temperature. Explain how you used the scatter plot to find this information.

11.

If there were a point at (0, A) what would it represent? Use the scatter plot to estimate a value for A.

12.

What would a point at (B, 0) represent? Use the scatter plot to estimate a value for B.

13.

Would it make sense to use this trend to estimate the value of sales when the average monthly temperature is 60 degrees Celsius? Explain your reasoning.

Cool Down: Quarterbacks

Quarterbacks

Here are a table and scatter plot that show ratings and wins for quarterbacks who started 16 games this season.



14.

Circle the point in the scatter plot that represents Player K’s data.

15.

Which quarterback’s data are
represented by the point farthest to the left?

16.

Player R is not included in the table
because he did not start 16 games this year. He did have a quarterback rating of 99.4 and his team won 8 games. On the scatter plot, plot a point that represents Player R’s data.