The document introduces point-slope form as y - y1 = m(x - x1), where m is the slope and (x1, y1) is a point on the line. It provides examples of writing equations in point-slope form given a point and slope, and graphing the equations. Additional examples demonstrate writing equations between standard form, point-slope form, and slope-intercept form.

1. Lesson 4­3.notebook November 29, 2012
Lesson 4.3:
*Standard form ­­>Ax + By = C
*slope­intercept form ­­> y = mx + b
NEW ONE:
*point­slope form ­­> y ­ y1 = m (x ­ x1)
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2. Lesson 4­3.notebook November 29, 2012
Lesson 4.3 examples:
Write an equation in point­slope form for the line that passes through the given
point with the given slope. Then graph the equation.
A) (­2, 5), slope = ­6 Y
X
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3. Lesson 4­3.notebook November 29, 2012
B) (3, ­2), slope = 1/4 Y
X
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4. Lesson 4­3.notebook November 29, 2012
Write each equation in standard form.
C) y + 2 = 7/8(x ­ 3)
D) y ­ 1 = ­2/3(x ­ 5)
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5. Lesson 4­3.notebook November 29, 2012
Write each equation in slope­intercept form.
E) y ­ 10 = 4 (x + 6)
F) y + 3 = ­1/3(2x + 6)
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