Constant of Proportionality 7.4C

As a school carnival, tickets can be purchased to participate in different activities. The table shows the total cost for different numbers of tickets. What is the constant of proportionality that relates, y the total cost in dollars to x, the number of tickets purchased?

• 4.00

• 0.25

• 1.00

• 0.10

Tags

CCSS.7.RP.A.2B

A recipe says to use 3 cups of flour to make 48 cookies. The constant rate of proportionality that relates the number of cookies made, y, to the number of cups of flour used, x, is (a)   .

Tags

CCSS.7.RP.A.2B

The cost of 3 pounds of grapes is $6.57. What is the constant of proportionality that relates the cost in dollars, y, to the number of pounds of grapes, x?

• 6.57

• 3

• 2.19

• Not here

Tags

CCSS.7.RP.A.2B

The graph shows the proportional relationship between the number of hours worked and the total pay for working at the ball park. The constant of proportionality is (a)   .

Tags

CCSS.7.RP.A.2D

Consider the equation y = kx where y = 7.5 and x = 3. What is the value of k, the constant of proportionality?

• 22.5

• 4.5

• 0.4

• 2.5

Tags

CCSS.7.RP.A.2B

Haley and Keri are setting up tables for a party. It takes them 15 minutes to set up 5 tables. If Haley and Keri work at a constant rate, the constant of proportionality would be (a)   .

Tags

CCSS.7.RP.A.2B

Mark is a rock climber. His height, in feet, when climbing a wall can be represented by the equation h = 15t, where t is time measured in hours. Which best describes this proportional relationship?

• Mark moves 15 feet per hour.

• Mark moves $\frac{1}{4}$ feet per hour.

• Mark moves 4 feet per hour.

• Mark moves $\frac{1}{15}$ feet per hour.

Tags

CCSS.7.RP.A.2B

Your dad is filling the family pool with water for the summer. After two hours, the water has reached a depth of 2.5 feet. After three hours, the water level has risen to

 $3\ \frac{3}{4}$  feet.  If the relationship between time and water depth is proportional, the constant of proportionality is (a)   .

Tags

CCSS.7.RP.A.2B

Brooklyn is running a 5K. Her mom records her time at three places during the race as shown in the table. If Brooklyn runs at a constant rate per minute, which statement best describes the constant of proportionality?

• Brooklyn runs $\frac{1}{6}$ kilometer per minute.

• Brooklyn runs $\frac{3}{2}$ kilometers per minute.

• Brooklyn runs 6 kilometers per minute.

• Brooklyn runs $\frac{2}{3}$ kilometer per minute.

Tags

CCSS.7.RP.A.2B

Ryan's science class conducts an investigation in which the measure the distance a toy car travels in seconds. The results of the investigation are shown in the graph. The constant of proportionality for this investigation is (a)   .

Tags

CCSS.7.RP.A.2B