Algebra: A Combined Approach (4th Edition)

Published by Pearson
ISBN 10: 0321726391
ISBN 13: 978-0-32172-639-1

Chapter 3 - Section 3.4 - Slope and Rate of Change - Practice: 7

Answer

a. neither b. perpendicular c. parallel

Work Step by Step

a. $x+y=5 \lt=\gt y=5-x$ $2x+y=5 \lt=\gt y=5-2x$ $-1\times2= -2$ b.$ 5y=2x-3 \lt=\gt y= \frac{2}{5}x-\frac{3}{5}$ $5x+2y=1 \lt=\gt 2y= 1-5x \lt=\gt y= \frac{1}{2}-\frac{5}{2}x$ $\frac{2}{5}\times-\frac{5}{2}= -1$ c. $y=2x+1 $ $4x-2y=8 \lt=\gt -2y=8-4x \lt=\gt y=-4+2x$
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