7-2 Rates (p ) Indicator- M1  Select appropriate units for derived measurements

7-2 Rates p  A rate is a ratio of two measurements with different units.  Unit rates are ratios with a denominator of 1. (Unit rates give an equal basis for comparison, and have many real-life applications, such as miles per hour, price per unit of weight, and calories per serving.) (Unit rates give an equal basis for comparison, and have many real-life applications, such as miles per hour, price per unit of weight, and calories per serving.)

 To convert a ratio to a unit rate, divide the numerator and denominator of the ratio by the number in the denominator.  Express each rate as a unit rate. (Denominator of 1) 1) $50 for 10 days 2) 8 revolutions in 2 minutes The unit rate is $5 per day. There are 4 revolutions per minute.

 In a bike race, Tariq rode 42 km in 2 hours. What was his unit rate? Write the rate as a fraction. Write the rate as a fraction. Find the equivalent rate with a denominator of 1. (The GCF of 42 & 2 is 2.) Write a sentence. Tariq rode at a rate of 21 km per hour.

 Population density is the number of people per square mile. What is the population density of a town with a population of 5,250 and an area of 5 square miles? Write the rate as a fraction. Write the rate as a fraction. Find the equivalent rate with a denominator of 1. (GCF) Write a sentence. The town’s population density is 1,050 people per square mile.

Homework Page #15-29 odd, all #15-29 odd, all