Ratio and Proportions Review

A scale model of the Golden Gate Bridge in San Francisco Bay is built with a scale of 1 foot : 525 feet. If the main span of the bridge is 4, 200 feet long, what is the length of the main span in the model?

• 10 feet

• 3 feet

• 6 feet

• 8 feet

Marie rode her bike 325 kilometers in 20 hours last month. Tamara rode her bike 255 kilometers in 15 hours last month. Are these speed rates proportional?

• No; Marie's rate is 16.25 kilometers per hour and Tamara's rate is 17 kilometers per hour.

• Yes; To find both speed rates, you need to divide distance by time.

• No; Marie's distance and time are greater than Tamara's distance and time.

• Yes; Their rates are almost the same.

The data in the table represents a proportional relationship. What equation would represent this data accurately? 

The data in the table represents a proportional relationship. What is the constant?

Determine if the data shown in the graph below shows a proportional relationship. If so, determine the equation.

• Not Proportional
  

• There isn't enough information given
  

Which of these has a lower unit price, then for 8 boxes of pasta for $15?

• 3 boxes for $7

• 10 boxes for $20

• 5 boxes for $9

• 12 boxes for $25

Which of the following graphs represents a proportional relationship?

• Graph A

• Graph B

• Graph C

• They are all proportional relationships.

You earn $40 shoveling off 5 sidewalks. You charge the same amount for each sidewalk. How much will you earn if you shovel 3 sidewalks?

• $16

• $20

• $24

• $36

Temperatures were taken after every 10 minutes for 4 experiments. Which of these experiments have a proportional relationship?

• Experiment 1

• Experiment 2

• Experiment 3

• Experiment 4

There are 4 birds and 6 snakes. What is the ratio of birds to snakes?

• 6/4

• 2/3

• 1/3

• 10/16