Solving Problems with Proportional Relationships

Richard is organizing the picnic lunch for a group of fourth graders. He recalls that at that last picnic 20 students used 80 napkins. Assuming the same rate this time, how many napkins should he pack for 200 fourth graders?

• 140

• 200

• 300

• 800

A train travels 3¾ miles every 1/60 of an hour. How far does the train travel in 2 hours?

The price for 7/8 of a pound of almonds is $6.65. What is the cost of 3½ pounds at the same rate? (do not type money sign)

The price of mangoes in a grocery store is 3 for $5. How much will 5 mangoes cost? Round the answer to the nearest hundredth. (do not type money sign)

This is a table with a proportional relationship between A and B. Find the missing value of B when A is 16.

• 33

• 44

• 32

• 48

How do you know that this is a proportional relationship?

• The unit rate .25

• The rate of change is constant and (0,0) is a solution.

• All of the ratios are equal

• All of the answers are correct

Is the given table a proportional relationship? If so, what is the unit rate?

• Yes; 1/3

• Yes; 3

• Yes; 5

• No

Does the table represent a proportional relationship?

• Yes

• No

Which table shows a proportional relationship between the distances on a map and the actual distances?

• 
• 
• 
• 

Is this table proportional or non-proportional?

• Proportional

• Non-Proportional

• both

• neither