Proportions Unit Review

Which situation is best described by the graph shown?

• JJ purchases chips for $0.75 per bag.

• Mark buys packs 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 below.

• 9

• 4

• 3

• 1.5

As the x-value increases by 20, the y-value increases by 10. Which of the following equations represents the relationship between the x and y-values?

• y = 2x

• y = x + 10

• y = 0.5x

• y = 10x

Art mows (1/8) acre in (1/4) hour. How many acres does Art mow per hour?

• (1/2) acre

• 4 acres

• 8 acres

• 2 acres

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?

• y = 100x + 230

• y = 230x + 100

• x = 2.30y

• y = 2.30x

The table shows the relationship between x-values and y-values. Which of the following statements is true?

• The constant of proportionality is 5.

• The y-intercept is 20.

• This is an example of a non-proportional relationship.

• The rate of change is 7.5.

The graph below shows the relationship between Sarah's savings account balance and the number of weeks that have passed. 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 gallons of gas used, y. Which of the following equations best represents the relationship?

• y = 35x

• y = 1/35x

• 35 = 1x

• y = 3.5x

A recipe for banana bread requires 1/3 cups of bananas for every 1/2 cups of sugar used. At this rate, how many cups of sugar should be used if 1 cup of bananas is used?

• 1) 1/6 cup

• 2) 0.5 cups

• 3) 1 cup

• 4) 1.5 cups

According to the photo, which of the following does NOT represent the number of months in a year?

• A

• B

• C

• D