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Module 4.5 Lesson 2 Unit Rate as the Scale Factor.notebook
1
February 03, 2017
Homework: 1.) Pages 13-14 #2, 4, and 6
2.) CRS #11 due Wednesday 2/8
Module 4.5 Lesson 2: The Unit Rate as the Scale 
Factor
2/3/17
Complete Handout
DO NOW:
Module 4.5 Lesson 2 Unit Rate as the Scale Factor.notebook
2
February 03, 2017
Module 4.5 Lesson 2 Unit Rate as the Scale Factor.notebook
3
February 03, 2017
Module 4.5 Lesson 2 Unit Rate as the Scale Factor.notebook
4
February 03, 2017
Module 4.5 Lesson 2 Unit Rate as the Scale Factor.notebook
5
February 03, 2017
Check HW Answers: Page S.5
Page S.6
Module 4.5 Lesson 2 Unit Rate as the Scale Factor.notebook
6
February 03, 2017
Check HW Answers: Page S.7
Module 4.5 Lesson 2 Unit Rate as the Scale Factor.notebook
7
February 03, 2017
Page S.9
Module 4.5 Lesson 2 Unit Rate as the Scale Factor.notebook
8
February 03, 2017
Module 4.5 Lesson 2 Unit Rate as the Scale Factor.notebook
9
February 03, 2017
They are proportional.
Yes.
The unit rate is the same for all measurements.
constant of proportionality.
Module 4.5 Lesson 2 Unit Rate as the Scale Factor.notebook
10
February 03, 2017
Module 4.5 Lesson 2 Unit Rate as the Scale Factor.notebook
11
February 03, 2017
Scale Factor:
scale factor = 
actual object
drawing
calculated by determining the constant of 
proportionality (or unit rate) between the scale 
drawing and the actual picture.
Module 4.5 Lesson 2 Unit Rate as the Scale Factor.notebook
12
February 03, 2017
Scale Factors greater than 1, 
reduce or enlarge the segment?
Scale Factors less than 1, 
reduce or enlarge the segment?
Module 4.5 Lesson 2 Unit Rate as the Scale Factor.notebook
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February 03, 2017
What is the scale factor?
Module 4.5 Lesson 2 Unit Rate as the Scale Factor.notebook
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February 03, 2017
Page S.74
Original
Measurements
Scale Drawing
Measurements
1
Module 4.5 Lesson 2 Unit Rate as the Scale Factor.notebook
15
February 03, 2017
Now use a scale factor of 1/2.
What will the dimensions be?
Original
Measurements
Scale Drawing
Measurements
1
Module 4.5 Lesson 2 Unit Rate as the Scale Factor.notebook
16
February 03, 2017
Solving Proportions
The cross product of all proportions are
equal. 4
5
8
10
= 7
10
28
40=
x
6
8
12
=
8
15
18
x
=
Module 4.5 Lesson 2 Unit Rate as the Scale Factor.notebook
17
February 03, 2017
Module 4.5 Lesson 2 Unit Rate as the Scale Factor.notebook
18
February 03, 2017
Module 4.5 Lesson 2 Unit Rate as the Scale Factor.notebook
19
February 03, 2017
5ft
Module 4.5 Lesson 2 Unit Rate as the Scale Factor.notebook
20
February 03, 2017
Module 4.5 Lesson 2 Unit Rate as the Scale Factor.notebook
21
February 03, 2017
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
Module 4.5 Lesson 2 Unit Rate as the Scale Factor.notebook
22
February 03, 2017
Closing
Module 4.5 Lesson 2 Unit Rate as the Scale Factor.notebook
23
February 03, 2017
Homework: Problem Set 17
Add the following information.
Sketch a scale drawing.
8in 10in
6in
Module 4.5 Lesson 2 Unit Rate as the Scale Factor.notebook
24
February 03, 2017

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Module 4.5 lesson 2 unit rate as the scale factor