Writing Equations in Point-Slope Form

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Lesson 5-5

• Writing Equations in Point-Slope Form

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Transparency 5
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display the answers.
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Transparency 5a
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Objectives

• Write the equation in a line in point-slope form
• Write linear equations in different forms

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Vocabulary

• Point-slope form - an equation of the form y
  y1 m(x x1), where m is the slope and (x1,y1)
  is a given point on a nonvertical line

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x-y Coordinate Plane
Quadrants
Point Plotting
I
II
up 7
left 4
right 5
III
IV
down 8
(x, y) (-4, 7) (5, -8) x left or
right y up or down
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Example 1
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Example 2
Write the point-slope form of an equation for a
horizontal line that passes through (0, 5).
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Example 3
In standard form, the variables are on the left
side of the equation. A, B, and C are all
integers.
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Example 4
In slope-intercept form is y mx b.
Answer
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Summary Homework

• Summary
• The linear equation y y1 m(x - x1) is written
  in point-slope form, where (x1,y1) is the given
  point on a nonvertical line and m is the slope
• Homework
• pg 289 16-26, 30-34, 42-48 even