Ratios Rates Unit Rates Proportions

Which is NOT equivalent to 3:5?

• 15:25

• 9:15

• 21:28

• 30:50

What is a Ratio?

What mathematical operation do ratios involve?

• addition

• subtraction

• multiplication

• division

The table shows the cost of long distance calls based on the number of minutes used. Is there a constant rate of change (unit rate), and if so what is it?

• Yes, 10 calls per minute

• Yes, $.10 per minute

• Yes, $.40 per minute

• Not a constant rate

Which has the better unit rate?

True or False. Option 1 has the best deal because it cost $0.50 per ear of corn.

• True

• False

A rate is a ratio.

• True

• False

• Not a clue.

Will spent $3.75 for 3 pounds of granola. What is his unit rate in dollars per pound?

Which statement best describes the relationship between x and y in the table?

• Proportional

• Not Proportional

In my fish tank, the ratio of red fish to blue fish is 3:5. There are 20 blue fish. How many red fish are there?