Topic 2 Review (Part 1)

For two quantities x and y, if y is always a constant multiple of x, they have a(n) ____.

• proportional relationship.

• inverse relationship.

• linear relationship.

• exponential relationship.

The value of the ratio y/x of two proportional quantities x and y is called the ____.

• constant of proportionality.

• variable of proportionality.

• factor of proportionality.

• coefficient of proportionality.

An equation that shows that two ratios are equal is a(n) ____.

• proportion.

• equation.

• expression.

• inequality.

A sunflower grows 8 feet in 92 days. Assuming that it grows at a constant rate, how many days did it take for the sunflower to grow 6 feet?

• 69 days

• 72 days

• 75 days

• 78 days

Mealworms are a healthy food for wild songbirds. Adam buys a 3.5-oz container of mealworms for $8.75. Marco buys a 3.75-oz container of mealworms for $9.75.

Which container is the better deal and why?

• Adam's container, it costs $2.50 per oz.

• Marco's container, it costs $2.60 per oz.

• Adam's container, it costs $2.60 per oz.

• Marco's container, it costs $2.50 per oz.

A painter mixes 2 1/2 pints of yellow paint with 4 pints of red paint to make a certain shade of orange paint. How many pints of yellow paint should be mixed with 10 pints of red paint to make this shade of orange?

• 5 pints

• 6 1/4 pints

• 6 1/2 pints

• 6 3/4 pints

Sally is going on vacation with her family. In 2 hours they travel 90.5 miles. If they travel at the same speed, write an equation that represents how far they will travel, d, in h hours.

• d = 45.25h

• d = 90.5h

• d = 180h

• d = 22.625h

The table shows the weights of bunches of bananas and the price of each bunch.

a) Identify the constant of proportionality (k).

b) Write an equation to relate weight, w, to the price, p.

• k=0.45

  p = 0.45w

• k=0.50

  p = 0.50w

• k=0.55

  p = 0.55w

• k=0.60

  p = 0.60w