CHAPTER_3_5 - 3.5 Equations of Lines Slope-Intercept Form...

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§ 3.5 Equations of Lines
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Martin-Gay, Beginning and Intermediate Algebra, 4ed 2 Slope-Intercept Form When a linear equation in two variables is written in the slope-intercept form, y = mx + b m is the slope and (0, b ) is the y -intercept of the line. Slope-Intercept Form of a Line y = 3 x – 4 The slope is 3. The y -intercept is (0, -4).
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Martin-Gay, Beginning and Intermediate Algebra, 4ed 3 Find the slope and y -intercept of the line –3 x + y = –5. First, we need to solve the linear equation for y. By adding 3 x to both sides, y = 3 x – 5. Once we have the equation in the form of y = mx + b , we can read the slope and y -intercept. slope is 3 y -intercept is (0, – 5) Example: Slope-Intercept Form
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Martin-Gay, Beginning and Intermediate Algebra, 4ed 4 Find the slope and y-intercept of the line 2 x – 6 y = 12. First, we need to solve the linear equation for y. – 6 y = – 2 x + 12 Subtract 2x from both sides. y
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CHAPTER_3_5 - 3.5 Equations of Lines Slope-Intercept Form...

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