Math Review 1.1-1.4

Which of the following pairs of quantities shows a proportional relationship?

• The number of students and the number of teachers in a school

• The distance traveled and the time taken at a constant speed

• The number of apples and the number of oranges in a basket

• The age of a person and the number of pets they own

If 3 notebooks cost $6, how much would 7 notebooks cost if the relationship is proportional?

• $12

• $13

• $14

• $15

Given the table below, does it represent a proportional relationship? (scroll down)

x y

1 2

2 4

3 6

4 8

• Yes

• No

What is the unit rate if it costs $1.50 for 3/4 of a pound of fruit?

• $1.00 per pound

• $2.00 per pound

• $2.50 per pound

• $3.00 per pound

Is the following relationship proportional? If so, what is the equation that shows the relationship between (x) windows washed and (y) amount earned?

• No, not proportional

• Yes, k=0.8

• yes, k=12

• yes, y=12x

If a recipe uses 1 2/3 cups of sugar for two batch of cookies, what is the unit rate of sugar per batch?

• 1/3 cup per batch

• 1 cup per batch

• 5/6 cup per batch

• 2 cups per batch

Which has the greater unit rate: 3/4 mile in 1/2 hour or 1 mile in 3/4 hour?

• 3/4 mile in 1/2 hour

• 1 mile in 3/4 hour

Which graph represents a proportional relationship?

• A straight line passing through the origin

• A curved line passing through the origin

• A straight line not passing through the origin

• A horizontal line

How do you find the constant rate? (also known as rate of change) (also called constant of proportionality)

• k=x/y

• k=y/x

• y=k/x

• y=kx

Which of the following graphs does NOT represent a proportional relationship?

• A straight line through the origin

• A straight line not passing through the origin

• A straight line with a positive slope through the origin (pointing diagonally up)

• A straight line with a negative slope through the origin (pointing diagonally down)