CCA Exam 1 Review

y = 2.5x

A garden hose fills a 2-gallon bucket in 5 seconds. The number of gallons, x, is proportional to the number of seconds, y, that the water is running. Write an equation that represents the relationship between x and y?

75.95

A scientist builds a Mars rover that can travel 4.9 centimeters per second on flat ground. If the rover continues at the same rate, how many centimeters will it travel in 15.5 seconds?

-24

Andy is scuba diving. He starts at sea level and then descends 10 feet in 2.5 minutes. If he continues at this rate, where will Andy be in relation to sea level after 6 minutes?

.4444.....

Four out of nine dogs weigh less than 20 pounds. What is the decimal equivalent for the number of dogs weighing less than 20 pounds?

5.5

If the equation y = 5.5x represents a proportional relationship, what is the constant of proportionality?

-15

In the first round of a card game, Niki scored 20 points. Then, she lost 10 points on one turn and an additional 25 points on her final turn. What was her final score?

16

Kristen goes on a cave tour with her family. They climb down to 8 meters below ground level. Then they climb the opposite of -8 meters to return to ground level. What is the total number of meters they climbed (in either direction)?

Yes

Is the value (-51/5) a rational number?

No

Is the value 2.010010001... a rational number?

Yes

Is the value 9.68888... a rational number?

45

What is the constant of proportionality?

9

What is the distance between -13 and -4?

282.50

Javier had $305 in his bank account. His bank charges a fee of $7.50 each month that a balance is below $500. If he makes no other deposits or withdrawals, how much money is in Javier's account at the end of three months?

1.2 miles per hour

Natalie walked (3/5) mile in (1/2) hour. How fast did she walk, in miles per hour?

4

The equation y = 2.5x relates proportional quantities x and y. what is the value of x when y = 10?

29.6

The equation y = 8x relates proportional quantities x and y. what is the value of y when x = 3.7?

-22.00

A catering company loses $110 as a result of a delay. The 5 owners of the company must share the loss equally. Which integer represents the change in profit for each owner?

Yes

Arianna runs up 4 flights of stairs and then runs down 4 flights of stairs. Does this situation represent additive inverses?

17

Carl and Cameron are at a pool. Carl dives in and touches the bottom of the pool, 15 feet below the surface of the water. Cameron is standing on a diving platform 2 feet above the surface, waiting for his turn. What is the vertical distance between Carl's hand and Cameron's feet?

No

Does the equation y = 3 x + 3 represent a proportional relationship?

Yes

Does the graph represent a proportional relationship?

Yes

Does the table represent a proportional relationship?

0.05

Sarah used 2.5 cups of cheese in a dish that serves 10 people. Amyn used 1.6 cups of cheese in a dish that serves 8 people. How much more cheese is in one serving of Sarah's dish?

-1.8

The temperature decreases at a rate of .12 degrees per hour. What is the change after 15 hours?