Solving Problems Using Proportional Reasoning

A snail travels 9 inches in a span of 3 hours. Which of the following represents the rate of change the snail traveled with respect to the time?

• 3 inches / 1 hour

• 3 hours / inch

• 1 inch / 3 hours

• 1 hour / 3 inches

A piece of luggage sells for $225.00. It is on sale this week for $195.00. What is the percent decrease, to the nearest whole percent?

• 18%

• 15%

• 13%

• 16%

The price of a coat increased from $82 to $90. What is the approximate price increase percentage?

• 9%

• 15%

• 14%

• 10%

Vanessa earned $76.00 in 8 hours. How much did she earn per hour?

• $10.50

• $8.00

• $9.50

• $10.00

Lydia drove 216 miles and used 6 gallons of gasoline on a recent trip. Which of the following represents the unit rate of gasoline used on this trip?

• 222 miles per gallon

• 3 miles per gallon

• 210 miles per gallon

• 36 miles per gallon

In chemistry, Seth recorded the weight of copper tubing as 15.4 grams. The actual weight was 15.8 grams. What is his percent of error, rounded to the nearest percent?

• 4%

• 6%

• 3%

• 5%

A ticket for a school musical is $12. There is a 5% transaction fee if the ticket is purchased online. What is the total cost of a ticket that is purchased online?

• $12.60

• $12.05

• $12.65

• $18.00

A bill at a restaurant is $60. A 15% tip is left for the server. What is the total cost of the bill?

• $75.00

• $69.00

• $9.00

• $45.00

Tallia typed 416 words in 8 minutes. Which of the following is a correct understanding of this rate?

• At this rate, it takes Tallia 52 minutes to type one word

• At this rate, Tallia can type 52 words in 8 minutes

• At this rate, Tallia can type 52 words in one minute.

• At this rate, Tallia can type 8 words in one minute.

An airplane descends 300 feet every 6 seconds. By how many feet does the airplane descend in 1 second?