Relationship Between Two Variables

Mr. Ramierz is filling his swimming pool with water. The table shows the number of gallons of water w in the swimming pool after t minutes. If the pattern in the table continues, how many gallons of water w will be in the pool after 10 minutes?

• 6 gallons

• 69 gallons

• 600 gallons

• 2,400 gallons

Colton earns $9 per hour mowing lawns. The total amount earned t equals the amount earned per hour times the number of hours h. Which equation gives the total amount earned t if Kenneth works h hours?

• t = 9h

• h = 9t

• t = 9 + h

• h = 9 + t

The table shows the number of people seated in each section of the gym depending on the total number of people in the gym. Which equation could be used to find the number of people that are seated in each section of the gym?

• n = 3p

• n = p ÷ 3

• n = p - 6

• n = p - 12

?

Mathematical Equivalence

OFF

How many people n would be seated in each section if there were 27 total people in the gym?

• 7

• 8

• 9

• 10

The table shows the total charges c for an overdue library book after d days. If the pattern in the table continues, what is the total charge c for an overdue library book after 12 days?

• $0.40

• $0.64

• $0.88

• $0.96

For what number of days d will the total charges for an overdue library book be $2.40?

• 30

• 24

• 8

• 5

The linear equation y = 5x represents the cost y in dollars of x pounds of dog food. Which ordered pair lies on the graph of the equation?

• (3,15)

• (3,10)

• (2,3)

• (2,12)

Brilee drives at a rate of 60 miles per hour. She lets x represent the time in hours and y represent the number of miles driven. Which ordered pair is a point on the graph of the relationship?

• (60,1)

• (4, 240)

• (3, 120)

• (2, 60
  (2, 60)

Meg wants to rent a bike. Bike rental costs $1.25 per hour plus a one-time fee of $3. Which equation represents the relationship between the number of hours h Meg rents the bike and the total cost c?

• h = 1.25c + 3

• c = 1.25h + 3

• h = 3c + 1.25

• c = 3h + 1.25