Proportional Reasoning: Written Descriptions

A recipe for a cake requires 2 cups of flour for every 3 eggs used. If this relationship is maintained, is the relationship between cups of flour and eggs proportional?

• Yes

• No

A taxi company charges a flat fee of $10 for pickup and then $2 for each mile driven. Is the relationship between miles driven and total cost proportional?

• Yes

• No

A school fundraiser sells tickets at a price of 5 tickets for $20. Is the relationship between the number of tickets bought and the total cost proportional?

• Yes

• No

A mobile data plan offers unlimited data for a fixed monthly fee, regardless of the amount of data used. Is the cost of the data plan proportional to the amount of data used?

• Yes

• No

A grocery store sells apples at a constant price per pound. If a customer buys more pounds, does the total cost have a proportional relationship with the weight of the apples?

• Yes

• No

A car travels at a constant speed of 60 miles per hour. Is the distance traveled proportional to the time spent driving?

• Yes

• No

A printer prints 20 pages per minute. If this rate is constant, is the relationship between the number of pages printed and the time taken proportional?

• Yes

• No

A subscription service charges a one-time signup fee and then a monthly rate thereafter. Is the total cost over time proportional to the number of months subscribed?

• Yes

• No

A recipe calls for 4 tablespoons of sugar for every 2 cups of flour. If the amount of flour is doubled, is the amount of sugar needed proportional to the original recipe?

• Yes

• No

A student reads at a constant rate of 30 pages per hour. Is the number of hours spent reading proportional to the number of pages read?

• Yes

• No