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Unit 3 Lesson 4 - TEXTBOOK 5.2 D IRECT AND INVERSE VARIATION PowerPoint Presentation
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Unit 3 Lesson 4 - TEXTBOOK 5.2 D IRECT AND INVERSE VARIATION. Variation relates to 2 variables: like x and y or age and height Direct Variation is when 2 variable change in the same sense. (one number gets bigger, so does the other)

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Unit 3 Lesson 4 - TEXTBOOK 5.2

DIRECT AND INVERSE VARIATION

Variation relates to 2 variables: like x and y or age and height

Direct Variation is when 2 variable change in the same sense.

(one number gets bigger, so does the other)

Inverse Variation is when 2 variables change in an inverse sense.

(one number gets bigger, so the other gets smaller ... a fraction of the 1st)

Example: the more people you invite to a party the higher the cost

Example: the more people you invite to a party the lower the cost per person. The cost per person varies inversely to the number of people that attend.

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Direct Variation -

a relationship between 2 numbers when their ratio remains constant.

The Direct Variation Equation is y = kx, where k is a constant not = 0

Characteristics - 1) Linear, increases or decreases at a constant rate

2) Graph goes through the origin

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Examples: y = 3x

They occur outside Algebra...

Example: C = d

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HOMEWORK:

PRACTICE WORKBOOK 5-2

# 1-9