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Mr. Johnson's science classroom has 4 fish tanks filled with the same type of fish. Each tank contains 4 fish that are the same age. One tank contains one-year-old fish, another tank contains two-year-old fish, another tank contains three-year-old fish, and the last tank contains four-year-old fish. The students measured the length of each fish and made the following chart comparing the age of each fish to the length of the fish in millimeters.

A) Make a scatter plot of the data from the table.

B) Sketch a line of best fit for the data.

C) Find the slope of the line of best fit for the data.

D) What meaning does the slope of the line of best fit have for this particular application?

E) Mr. Johnson's students believe that one of the fish is in the wrong tank and therefore has the wrong age recorded. Circle the point on your scatter plot that represents this fish.

F) What would most likely be the correct age for this fish? Explain how you found your answer.

Materials/Resources:

• Calculator
• HSPA Mathematics Reference Sheet
• Graph Paper

Techniques for PAT Scoring:
See item-specific sample response and scoring rubric B1312-005R for this PAT.

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