6.5 Parallel and Perpendicular Lines #1-11 - Mari Yahner | Library

6.5 NOTES = ONLINE BOOK PAGE #164

Video Lesson

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Parallel Lines have

slopes that are the same

slopes that are opposite of each other

slopes that are negative reciprocals

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Perpendicular Lines have

slopes that are the same

slopes that are only negative of each other

slopes that are negative reciprocals of each other

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How do you get the Negative Reciprocal of a number?

Add a negative sign to it

Swap the numerator and the denominator

Swap the numerator and the denominator and switch the sign

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What is the slope of a line parallel to y = -1/2 x -7 ?

7

1/2

-1/2

-3

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What is the slope of a line parallel to y = 3x -7 ?

7

3

-1/3

-3

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What is the slope of a line PERPENDICULAR to y = 5/4 x -2 ?

1/2

4/5

-1/2

-4/5

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What is the slope of a line PERPENDICULAR to y = -1/2 x -7 ?

2

1/2

-1/2

1/7

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Write the equation of the line that passes through the point (0, 1) and is PARALLEL to y = 4x - 3.

y = 4x + 1

y = -1/4x + 1

y = 4x

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Write the equation of the line that passes through the point (-1, 5) and is PARALLEL to y = -x + 1.

y = -x + 1

y = -x + 4

y = x + 6

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Write the equation of the line that passes through the point (0, 9) and is PERPENDICULAR to y = 1/5x + 4.

y = -1/5x + 9

y = 5x + 9

y = -5x + 9

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Write the equation of the line that passes through the point (2, 6) and is PERPENDICULAR to y = -2x - 3.

y = 1/2x - 1

y = -2x + 10

y = 1/2x + 5