Ratio Models

Match the ratio 3:5 to the situation it correctly models.

• There are 3 times as many girls than boys.

• For every cup of water added to the batter, there are 5 cups of flour added.

• For every 3 students wearing Adidas, there are 5 students wearing Nikes.

Match the ratio 1 to 5 to the situation it correctly models.

• There are 3 times as many girls than boys.

• For every cup of water added to the batter, there are 5 cups of flour added.

• For every 3 students wearing Adidas, there are 5 students wearing Nikes.

Match the ratio 15:5 to the situation it correctly models.

• There are 3 times as many girls than boys.

• For every cup of water added to the batter, there are 5 cups of flour added.

• For every 3 students wearing Adidas, there are 5 students wearing Nikes.

Watson is making nachos. For every 4 cups of chips that he uses for the nachos, he uses 5 cups of cheese. If Watson wants to use 12 cups of chips, how many cups of cheese will he need to use. Use a tape diagram to show your work.

• 3

• 9

• 12

• 15

If the ratio of cats to dogs is 3:4, how many cats are there if there are 20 dogs?

• 15 cats

• 25 cats

• 30 cats

• 10 cats

The formula for calculating the unit rate (k).

• x = yk

• y = kx

• k = yx

• k = y/x

The format we use to write an equation with unit rate (k)

• y = k/x

• y = kx

• k = y/x

• k = xy

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 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

Ashley biked 32 miles in 2 hours. Mike biked 36 miles in 3 hours. How much farther can Ashley bike than Mike in 5 hours if they both continue at the same rate?

• 80

• 60

• 40

• 20