Precalculus (6th Edition) Blitzer

Published by Pearson
ISBN 10: 0-13446-914-3
ISBN 13: 978-0-13446-914-0

Chapter 1 - Section 1.4 - Linear Functions and Slope - Exercise Set - Page 213: 62

Answer

a) $y=-\frac{2}{3}x-2$ b) $m=-2/3$, $b=-2$ c) See below

Work Step by Step

(a) Rearrange the equation in standard slope-intercept form of $y=mx+c$ by solving the equation for y. Bring all the variables other than y and constant terms to one side. $\begin{align} & 4x+6y+12=0 \\ & y=-\frac{2}{3}x-2 \end{align}$ (b) From (a) above, the slope-intercept form of the equation is $y=-\frac{2}{3}x-2$. Compare the given equation with the standard slope-intercept form of the equation; $y=mx+c$ where m is the slope and c is the y-intercept of the equation. The value obtained will be $m=-\frac{2}{3}$ and $c=-2$. Hence, the slope of the equation is $-\frac{2}{3}$ and the y-intercept is $-2$.
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