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Unformatted text preview: § 3.3 Intercepts MartinGay, Beginning Algebra, 5ed 2 Intercepts Intercepts of axes (where graph crosses the axes) Since all points on the xaxis have a y coordinate of 0, to find xintercept, let y = 0 and solve for x Since all points on the yaxis have an x coordinate of 0, to find yintercept, let x = 0 and solve for y MartinGay, Beginning Algebra, 5ed 3 Find the yintercept of 4 = x – 3 y Let x = 0. Then 4 = x – 3 y becomes 4 = – 3 y Replace x with 0. 4 = – 3 y Simplify the right side. = y D ivide both sides by – 3. 3 4 So the yintercept is (0, ) 3 4 Intercepts Example: MartinGay, Beginning Algebra, 5ed 4 Find the xintercept of 4 = x – 3 y Let y = 0. Then 4 = x – 3 y becomes 4 = x – 3( ) Replace y with 0. 4 = x Simplify the right side. So the xintercept is (4,0) Intercepts Example: MartinGay, Beginning Algebra, 5ed 5 Graph the linear equation 4 = x – 3 y by plotting intercepts....
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This note was uploaded on 06/10/2009 for the course MAC 1103 taught by Professor Prescott during the Spring '09 term at PascoHernando Community College.
 Spring '09
 prescott
 Algebra

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