Calculus 10th Edition

Published by Brooks Cole
ISBN 10: 1-28505-709-0
ISBN 13: 978-1-28505-709-5

Chapter P - P.2 - Linear Models and Rates of Change - Exercises - Page 17: 74


(a) $ f, c, e, d$ (b) $b, a$ (c) $c \parallel d$ and $d \parallel f$ (d) $b \perp f$ and $b \perp d$

Work Step by Step

(a/b) Lines where y increases as x increases have positive slopes $\rightarrow c, f, d, e$ while those where y decreases as x increases have negative slopes $\rightarrow a, b$ (c) Lines that appear to never intersect even when extrapolated are have equal slopes and are said to be parallel $\rightarrow c \parallel d$ and $d \parallel f$ (d) Lines that intersect at right angles are deemed orthagonal or perpendicular $\rightarrow b \perp d$ and $b \perp f$
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