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Big Ideas Math: Modeling Real Life, Grade 7

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Big Ideas Math: Modeling Real Life, Grade 7 View details

Practice Test

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Exercise 1 Page 228

A rate is a special type of ratio that compares quantities with unlike units of measure. A unit rate is a rate that has been reduced to have a denominator of 1 unit.

7 miles per day

A rate is a special type of ratio that compares quantities with unlike units of measure. A unit rate is a rate that has been reduced to have a denominator of 1 unit. We know that 84 miles correspond to 12 days.

unit rate

Let's write a ratio to show that 84 miles can be traveled in 12 days. 84miles/12days or 84/12 To find the unit rate, we write an equivalent rate with a denominator of 1.

84/12

a/b=.a / 12./.b / 12.

84/ 12/12/ 12

Calculate quotient

7/1

\dfrac a b = a:b

7:1

The unit rate is 7 miles per day.

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