7.4 A and 7.7 A Constant Rate of Change Test Review

Match the equation to the graph

• y = -2/5 x -2

• y = 2/5 x +2

• y = 2 x - 2/5

• y = 2/5 x -2

Match the equation to the graph

• y = -3 x -2

• y = 3 x +2

• y = 2 x +3

• y = -3 x +2

Match the equation to the graph

• y = 1/2 x - 4

• y = - 1/2 x + 4

• y = 1/2 x + 4

• y = 4 x + 1/2

Match the equation to the graph

• y = 1/2 x - 4

• y = - 1/2 x + 4

• y = 1/2 x + 4

• y = 4 x + 1/2

An office supply company is advertising dry erase markers for $0.99 per marker. Which equation can a customer use to find the cost (C) to purchase any number (n) of markers?

• n = 0.99C

• C = 99 / n

• n = C + 99

• C = 0.99n

Kelly saves $65 per week. Which equation can she use to find the total amount of money (t) she can save for any number of weeks (w)?

• w = 65t

• t = 65w

• 65 = tw

• t = w + 65

During migration, a butterfly can travel 30 miles in 1 hour. Which graph best represents y, the number of miles a butterfly can travel in x hours?

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An artist is making a scale model of a statue. On the model 2 inches represents 1 foot on the actual statue. Which graph best represents this relationship?

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Jed has 6 dollars but spends $0.50 on a soda each day. Which equation can be used to find y, the remaining money he has after x days?

• y = 0.50 x + 6.00

• y = - 0.50 x + 6.00

• y = 6.00x - 0.50

• y = 6.00x + 0.50

In New York, the temperature was 40 degrees. The temperature continued to fall at a rate of 1.5 degrees each hour. Which equation can by used to find y, the temperature after x hours?

• y = 1.5 x + 40

• y = - 1.5 x + 40

• y = 40x - 1.50

• y = 40x + 1.5