Ratio, Unit Rate and Proportional

unit rate

• the part of the rate in a proportional relationship

• a number that when raised to the third power is equal to x

• a number that cannot be expressed as a quotient of two integers,terminating decimal or reapeating decimal

• the product of an integer used as a factor 3 times

constant of proportionality

• the product of a integer times itself

• the unit rate in a proportional relationship

• a number when multiplied by itself is equal to x

• a number that can be expressed as a quotient of two integers, a reapeating decimal, or a terminating decimal

What is a Ratio?

• Is a comparison of two quantities 

• A rate with a denominator of one

• It is when the only factor the numerator and denominator share is a one 

• Two decimals that can be multiplied

What is the cost per hour for a canoe rental?

• $12 per hour

• $14 per hour

• $18 per hour

• $26 per hour

Kelly has 10 apps on her iPad.
5 are school apps, 2 are music apps, and 3 are games.
What is the ratio of school apps to game apps?

• 5 to 2

• 3 to 5

• 5 to 10

• 5 to 3

Mr. Wright has 7 boys and 9 girls. What is the ratio of girls to boys?

• 7 to 9

• 9 to 7

Your brother has a bag of marbles.  He has 8 green marbles, 3 blue marbles, 7 red marbles, and 2 yellow marbles.  What is the ratio of blue marbles to red marbles?

• 3 to 8

• 3 : 7

• 2 to 7

• 2 : 3

Which rate is equivalent to $9 per hour?

• $27 in 3 hours

• $28 in 4 hours

• $33 in 3 hours

An eight pack of juice boxes costs $4.79, and a 12 pack of juice boxes cost $6.59. Use this information to calculate the better buy.

• 8 pack

• 12 pack

What mathematical operation do ratios involve?

• addition

• subtraction

• multiplication

• division