Rate: a ratio that compares two different kinds of numbers, such as miles per hour (mph) or dollars...
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Transcript of Rate: a ratio that compares two different kinds of numbers, such as miles per hour (mph) or dollars...
8.2 RATES
Rate: a ratio that compares two different kinds of numbers, such as miles per hour (mph) or dollars per pound
Unit Rate: compares the price of an item to its unit measure
Rate
Miles per hour (mph)
Feet per second
Heartbeats per minute - heart rate
Dollars per hour baby sitting fee
Activity
Count the number of times your heart beats in 10 seconds. (Record results as a fraction)
Ask a partner to count his or her pulse for 15 seconds. (Record results as a fraction)
Whose pulse is faster?
RATEOn a vacation, Linda’s family traveled 495 miles at 55 mph. How long did the trip take?
Formula Rate= Distance Time
55=495T
Rate= Distance Time
1. You rode your bike 2 hours and traveled 24 miles. What is your rate of speed.
2. You rode your bike at a rate of 10 miles per hour for 4 hours. How many miles did you travel?
3. You ride 18 miles and travel at a rate of 12 mph. How long did this take you?
UNIT RATECompares the price of n item to its unit measure
Unit Rate
1. Eggs are on sale for .72 per dozen. How much is each egg?
Per =divide2. You biked 68 miles in 4 days. Find the
unit rate?
3. Which of the following is the better buy: 2 batteries for $1.50 or 6 batteries for $4.80?
INDEPENDENT ACTIVITY
Complete p. 406 #1-17