Carnegie 8th Math Module 2 End of Topic Assessment

Which graph represents y as a function of x?

• [Graph a]

• [Graph b]

• [Graph c]

• [Graph d]

Nicolai measured and tracked the growth of a sunflower he planted. The graph and the table show the linear relationship between the height of the sunflower, in inches, and the time, in weeks. What is the slope of the line that models this situation?

• 2

• 3/2

• 4

• 5/2

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TEKS.MATH.P.2I

Harry has $10 in his bank account, and he adds $2 every week. Based on this information, which equation best shows the relationship between the amount of money Harry has in his bank account, y, and the number of weeks that have passed, x?

• y = 10 - 2x
• y = 2x
• y = 10 + x
• y = 10 + 2x

The graph shows the amount of money spent from an account in a certain number of weeks. Which function can be used to determine y, the account balance after x weeks?

• y = -20x + 210

• y = 20x - 210

• y = 20x

• y = -20x

Cars leave a parking lot after a football game. The table shows the linear relationship between the number of cars remaining in the parking lot and number of hours after the game ends. Which function can be used to determine y, the number of cars remaining in the parking lot x hours after the game ended?

• y = -15,000x + 60,000

• y = -15,000x + 45,000

• y = 15,000x + 45,000

• y = 15,000x + 60,000

Determine whether the table of values represents y as a function of x. Explain your reasoning.

Determine whether the set of ordered pairs represents y as a function of x. Explain your reasoning.

Determine if the mapping represents y as a function of x. Explain your reasoning.

Determine if the graph represents y as a function of x. Explain your reasoning.

Pasquale is driving to his grandmother’s house for the weekend. He drives at a constant speed of 65 miles per hour on the freeway. Define variables and write an equation to represent the problem situation.

• d = 65t
• d = 65 + t
• d = 65 - t