Calculus: Early Transcendentals 8th Edition

Published by Cengage Learning
ISBN 10: 1285741552
ISBN 13: 978-1-28574-155-0

Diagnostic Tests - B Diagnostic Tests: Analytic Geometry - Page xxviii: 1

Answer

(a) $y = -3x+1$ (b) $y = -5$ (c) $x = 2$ (d) $y = \frac{1}{2}x-6$

Work Step by Step

(a) We can find the y-intercept $b$: $y = mx+b$ $y = -3x+b$ $(-5) = -3(2)+b$ $b = 6-5$ $b = 1$ The equation of the line is: $y = -3x+1$ (b) If the line is parallel to the x-axis, then the slope is 0 and the value of $y$ is constant. The equation of the line is: $y = -5$ (c) If the line is parallel to the y-axis, then the value of $x$ is constant. The equation of the line is: $x = 2$ (d) We can find the slope of the given line: $2x-4y = 3$ $4y = 2x-3$ $y = \frac{1}{2}x-\frac{3}{4}$ The slope of this line is $\frac{1}{2}$ We can find the y-intercept $b$: $y = mx+b$ $(-5) = \frac{1}{2}(2)+b$ $b = -5-1$ $b = -6$ The equation of the line is: $y = \frac{1}{2}x-6$
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