Prealgebra Ratios and Proportional Relationships

Simplify the ratio of
35 : 14

• 5 : 2

• 2 : 5

• 3 : 1

• 35: 14

What is the ratio of red apples to green apples

• 7 apples to 3 green

• 4 red apples to 7 apples

• 4 red apples to 3 green apples

• 3 green apples to 4 red apples

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 unit rate in this proportional relationship?

• 60 miles/1 hour

• 120 miles/ 2 hours

• 1 mile/ 1 hour

Lucy spends $1.75 on a cup of coffee each day. Fill in the following table to represent a proportional relationship.

b

d

e

a

$8.75

$3.00

$7.00

$5.25

$10.50

$12.25

$3.50

$1.75

• a

• b

• c

• d

• a

• b

• c

• d

A photographer can take 12 pictures in 5 minutes.  How long will it take him to take 132 pictures?

• 50 minutes

• 55 minutes

• 60 minutes

• 65 minutes

Which statement below accurately represents the graph?

• $100 is earned for each hour worked

• $200 earned for every 2 hours worked
  is the unit rate

• $500 is earned for every 8 hours worked

• $300 is earned after working 4 hours

Is this table proportional?

• Yes

• No