Module 4 Quiz Review

A robot cleans 450 parts in 20 minutes. How many parts does it clean in one hour? 

• 22.5 parts per hour
• 150 parts per hour
• 1,350 parts per hour
• 1,800 parts per hour

If Sarah runs 2.1 miles in 15 minutes, how far can she run in 90 minutes?  

• 12 miles
• 10 miles
• 12.6 miles
• 11.9 miles

What is the unit price for chocolate if 2.3 pounds cost $12.65?

• $0.19 per pound
• $5.50 per pound
• $4.55 per pound
• $0.18 per pound

A student spends the same amount each week for bus fare. In 3 weeks, she spends $126. Write an equation that shows this relationship. Let x = number of weeks. 

• y= 42x
• y=126x
• y=42 + x
• x=42y

Which table shows a constant rate of change? 

• A
• B
• C

What equation represents the relationship between time and total saved according to the graph?

• y=10x
• y=20x
• y=15x
• y=12x

What is the value for _k in the table?

• 10
• 100
• .25
• 25

_{^{Find the constant of proportionality and write an equation for this relationship.}}

• k=60; y=60x
• k=130; y=130x
• k=65; y=65x
• Not proportional

A rabbit can run short distances at a rate of 35 miles per hour. A fox can run short distances at a rate of 21 miles per half hour. Which animal is faster, and by how much?

• A The rabbit; 7 miles per hour
• B The fox; 7 miles per hour
• C The rabbit; 14 miles per hour
• D The fox; 14 miles per hour

One gallon of paint covers about 450 square feet. How many square feet will 1.5 gallons of paint cover?

• 300 square feet
• 451.5 square feet
• 675 square feet
• 900 square feet