1. 6.1 Ratios January 03, 2012
Bellwork
Write in simplest form.
30
35
12
15
40
24
Objective ­ write ratios and find rates
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2. 6.1 Ratios January 03, 2012
ratio ­ a comparison of two quantities by division. You can write a ratio in different ways
example
10 to 15, 10 : 15, 10
15
A survey asked students whether they had after­school jobs.
Write each ratio as a fraction in simplest form.
After ­ School Jobs
Response Number
Have a Job 40
a) students with jobs to students without jobs Don't Have a Job 60
Total 100
b) students without jobs to all students surveyed
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3. 6.1 Ratios January 03, 2012
Rate ­ a ratio that compares quantities in different units.
The table shoes prices for different sizes of the same dish detergent.
Which size has the lowest price?
Size Volume Price
Regular (fl oz)
Regular 12 $1.20
Family 28 $2.24
Economy 40 $3.60
Family
Economy
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4. 6.1 Ratios January 03, 2012
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5. 6.1 Ratios January 03, 2012
Unit Rate ­ rate that has a denominator of 1.
Examples include unit prices, gas mileage and speed.
Find the unit rate.
Two liters of spring water cost $1.98.
A car goes 425 miles on 12.5 gal of gas.
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6. 6.1 Ratios January 03, 2012
Convert 10 mi/h to feet per minute.
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7. 6.1 Ratios January 03, 2012
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8. 6.1 Ratios January 03, 2012
HW pg. 290 # 8­28 even
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