Solve Proportion

Identify all the proportions that could be written for the situation above.

The county requires 2 teachers for every 45 students. Which proportion give the number t of teachers needed for 315 teachers.

Solve for x 

• x = 16

• x = 28

• x = 1/26

• x = 26

Solve the proportion.

• 10.8

• 7.5

If y is directly proportional to x, and y = 10 when x = 2, what is the value of y when x = 5?

• 15

• 20

• 25

• 30

Given the graph of a line that passes through the origin and the point (4, 8), which of the following is true about the relationship between x and y?

• The relationship is not proportional.

• The relationship is proportional, and the constant of proportionality is 0.5.

• The relationship is proportional, and the constant of proportionality is 2.

• The relationship is proportional, but the constant of proportionality cannot be determined.

Which of the following scenarios describes a proportional relationship?

• The number of pages a printer prints per minute.

• The temperature in degrees Fahrenheit as the day progresses.

• The cost of apples per pound at a grocery store.

• The height of a plant as it grows irregularly over time.

If a recipe calls for 3 cups of flour for every 4 cups of sugar, what is the constant of proportionality for the amount of sugar to flour?

• 1

• 7