Ratios and Proportions

Which is correctly set up to represent this story?"4 out of 5 students is Mrs. O'Neall's 7th grade class have a cell phone. If there are 365 total students in the 7th grade, how many would you expect to have a cell phone?"

Two ratios that are equal are

• similar sides

• unit rates

• congruent

• proportional

Is this table proportional?

• Yes

• No

What is the constant of proportionality of this table?

• 0

• 1

• 10

• 13

There were 5 ice cream cones for every 3 brownies sold at the ice cream shop. If there were 24 brownies sold, how many ice cream cones were sold?

• 8

• 15

• 40

• 29

About 13 out of 20 homes have a personal computer. On a street with 60 homes, how many would you expect to have a personal computer?

• 39 Computers

• 4.3 Homes

• 39 Homes

• 4.3 Computers

Is this table proportional?

• Yes

• No

Is this graph proportional?

• Yes 

• No

Determine whether each pair of ratios forms a proportion

• Proportion

• Not a Proportion

Solve the proportion.

• k=5

• k=3.3333333

• k=60

• k=90