Solve Problems Involving Proportional Relationships

Solve the proportion below:

• 42

• 6

• 2

• 28

The number of words Maria typed varied directly with the amount of time she spent typing. If she typed 275 words in 5 minutes, how long would it take her to type 1,100 words?

• 220 minutes

• 20 minutes

• 15 minutes

• 4 minutes 

Josh bought a pizza with eight slices of pizza for $12. What is the cost of a slice of pizza?

• $12

• $1.50

• $3

• $1

Jeff ran 6 miles in 4 hours. At this rate, how many miles will he run in 6 hours?

• 9 miles

• 4 miles

• 6 miles

• 36 miles

Jacob mixed 8 cups of flour with 2 cups of water to make pizza dough.  To represent the relationship between the number of cups of flour, f, and the number of cups of water, w, needed to make the same pizza dough, Jake wrote the equation
f = ____ w
What should be placed in the blank?

• 1/4

• 8

• 2

• 4

Which statement best describes the relationship between x and y in the table?

• Proportional

• Not Proportional

In the equation y = 14x, what is the constant of proportionality?

• y

• x

• 14

You spend $40 on 5 pounds of concrete. What is the unit rate in dollars per pound?

• $8 per pound

• $5 per pound

• $35 per pound

• 0.125 pounds per dollar

Solve the equation

2/5 c = -10

What is the equation to find the constant of proportionality?

• y = mx + b

• x = k/y

• k = x/y

• k = y/x