Constant Ratio Homework

Select all the ratios that are equivalent to 10:8.

• 5:4

• 8:10

• 20:16

• 12:10

• 9:7

A mixture of orange paint contains 3 teaspoons of red paint and 7 teaspoons of yellow paint. To make the same shade of orange paint using 35 teaspoons of yellow paint, how much red paint would you need?

Hint: Draw a double number line diagram to help if needed.

• 12 teaspoons

• 15 teaspoons

• 18 teaspoons

• 26 teaspoons

3 apples cost $9.99. At this rate, how much do 4 apples cost?

• $24.76

• $15.54

• $13.32

• $20.45

A bag contains 100 marbles. Some are blue and the rest are green. There are 9 blue marbles for every green marble. How many green marbles are in the bag?

Hint: Draw a tape diagram if needed.

• 20

• 90

• 80

• 10

What is the constant of proportionality?

• 7

• 14

• 10

• 21

• A

• B

• C

• D

The ratio of blue cards to green cards is 2 to 5. An equivalent ratio to 2 to 5 would be ​ (a)   to ​ (b)   .

• 14

• 35

• 2

• 5

• 7

• 3

• 10

• 13

Name the constant of proportionality.

• 20

• 40

• 16

• 35

The table below shows the cost of making denim jeans. Which ratio is equivalent to the rate of change?

To make grape soda, Noah mixes 5 cups of grape juice with 7 cups of soda water. Andre mixes 6 cups of grape juice with 9 cups of soda water. Which ratio is equivalent to Noah's mixture? Hint: Draw a double number line or a table.

• 30:42

• 21:15

• 15:30

• 44:74