Proportional Relationships

Which situation is best described by the graph shown?

• JJ purchases chips for $0.75 per bag.

• Mark buys a pack of gum for $1.50 each

• Paula pays $0.50 per ticket at the fair.

• Franco purchases flowers for $3.00 each.

Find the constant of proportionality in the graph.

• 9

• 4.5

• 3

• 1.5

A bag of popcorn contains 483 calories and serves 3.5 people.

How many calories are in each serving?

An app developer projects that he will earn $230.00 for every 100 apps downloaded.

Which of the following equations can be used to represent the proportional relationship

between the number of apps, x, and the total earnings, y?

Based on the information in the table, what

is the constant of proportionality?

The graph shows the relationship between the amount

of money in Sarah’s savings account over a period of time.

Which of the following statements is NOT true about the relationship?

• After 5 weeks, Sarah has $100 in her account.

• If Sarah has a balance of $60, then 7 weeks have passed.

• The relationship is proportional.

• The situation can be represented by the

  equation y = 200 – 20x.

The table below shows the relationship

between the number of miles traveled, x, and

the number of gallons of gas used, y.

Which of the following equations best

represents the relationship?

The graph shows the amount of money that

Terrance saves each week from his lawn moving job.

Which best represents the unit rate?

Which of the following does NOT represent the number of months in a year?

• 
• 
• y = 12x, where x

  represents the number of

  years and y represents the

  number of months

• There are 96 months in 8

  years.