Post on 13-Apr-2017
Module 4.5 Lesson 2 Unit Rate as the Scale Factor.notebook
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Homework: 1.) Pages 13-14 #2, 4, and 62.) CRS #11 due Wednesday 2/8
Module 4.5 Lesson 2: The Unit Rate as the Scale Factor
2/3/17
Complete HandoutDO NOW:
Module 4.5 Lesson 2 Unit Rate as the Scale Factor.notebook
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Check HW Answers: Page S.5
Page S.6
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Check HW Answers: Page S.7
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Page S.9
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They are proportional.
Yes.
The unit rate is the same for all measurements.
constant of proportionality.
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Scale Factor:
scale factor = actual objectdrawing
calculated by determining the constant of proportionality (or unit rate) between the scale drawing and the actual picture.
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Scale Factors greater than 1, reduce or enlarge the segment?
Scale Factors less than 1, reduce or enlarge the segment?
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What is the scale factor?
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Page S.74
Original Measurements
Scale Drawing Measurements
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Now use a scale factor of 1/2.
What will the dimensions be?
Original Measurements
Scale Drawing Measurements
1
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Solving Proportions
The cross product of all proportions are equal. 4
5810= 7
102840=
x6
812= 8
1518x=
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5ft
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A scale map was made using a scale of 1 cm equals 250 miles. If the actual distance was 400 miles, what would be distance be on the scale map?
I am going to make a scale model of my car. I will use a scale where 1 inch on the model is 1.5 feet in real life. My car is 12 feet long, how many inches long should the model be?
EXTRA EXAMPLES
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Closing
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Homework: Problem Set 17Add the following information.
Sketch a scale drawing.
8in 10in
6in
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