Rates, Ratios, Proportions, and Unit Rates.

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Rates, Ratios, Proportions, and Unit Rates. Dawson Durgin B-Block. Rates. A rate is a ratio between two measurements with different units, usually per time. There are two ways it is used.

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### Rates, Ratios, Proportions, and Unit Rates.

Dawson Durgin

B-Block

Rates
• A rate is a ratio between two measurements with different units, usually per time. There are two ways it is used.
• An average rate can be calculated using the total distance travelled between a and b, divided by the travel time
• An instantaneous rate can be determined by viewing a speedometer.
Rate Problem
• A car is traveling 50 miles per hour. At this rate, how many hours have gone by when the car has traveled 120 miles with a 30 minute break?
• A: 3 hours
• B: 4 hours 50 minutes
• C: 5 hours 36 minutes
• D: 8 hours