Intermediate Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-894-7
ISBN 13: 978-0-13417-894-3

Chapter 2 - Section 2.5 - The Point-Slope Form of the Equation of a Line - Exercise Set: 32

Answer

(a) $-9$ (b) $\frac{1}{9}$

Work Step by Step

RECALL: (i) The slope-intercept form of a line's equation is $y=mx+b$, where m=the slope and b=the y-intercept. (ii) Parallel lines have equal slopes. (iii) Perpendicular lines have opposite reciprocal slopes. The given line has $m=-9$, so its slope is $-9$. Thus, (a) The slope of any line parallel to the given line is: =$-9$ (b) The slope of any line perpendicular to the given line is: $=\frac{1}{9}$
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