Chapter Four Functions

Use the expression 16x to determine how many cups are in 7 gallons, where x represents the number of gallons.

• 112 cups

• 80 cups

• 128 cups

• 96 cups

Which table represents the relation {(2, 5), (–7, –7), (–1, –2), (5 ,–1)}?

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If f(x) = 3x + 5, find f(2).

• 4

• 10

• 8

• 2f

The school cafeteria sells bags of chips for $1 and sandwiches for $4. If Romi has $10 to spend on c bags of chips and s sandwiches, graph the equation to find out how many bags of chips and sandwiches Romi can buy.

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Brendan and his family are going to rent bicycles while they are on vacation. The costs to rent bicycles from two different companies are shown in the table and the graph. Compare the y-intercepts and rates of change. Which statement is true?

• The rate of change is greater for The Bicycle Company.

• The y-intercept is the same for both companies.

• The rate of change is the same for both companies.

• The y-intercept is greater for The Bicycle Company.

Manuel opened a savings account with an initial balance. Each week he adds $20 to the account. After 6 weeks he has $170 in the account. Find and interpret the rate of change and the initial value.

• Manuel saves $50 per week. The initial balance is $20.

• Manuel saves $20 per week. The initial balance is $50.

• Manuel saves $20 per week. The initial balance is $150.

• Manuel saves $20 per week. The initial balance is $0.

For the Fall Festival students take wagon rides in hay around the neighborhood. Six students can fit into each wagon. Determine if the function is linear or not.

• Neither

• Both

• Linear

• Nonlinear

Find the graph of y = -0.5x².

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On Monday, it snowed lightly for a while, stopped for a while, snowed heavily, and then stopped. Which graph represents the situation?

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