Big Ideas Math - Algebra 1, A Common Core Curriculum

Published by Big Ideas Learning LLC
ISBN 10: 978-1-60840-838-2
ISBN 13: 978-1-60840-838-2

Chapter 4 - Writing Linear Functions - 4.1 - Writing Equations in Slope-Intercept Form - Exercises - Page 180: 43

Answer

The graph is shown below.

Work Step by Step

The given linear equation is $\Rightarrow 3x+5y=-15$ $x-$ intercept. Substitute $0$ for $y$. $\Rightarrow 3x+5(0)=-15$ Simplify. $\Rightarrow 3x+0=-15$ $\Rightarrow 3x=-15$ Divide each side by $3$. $\Rightarrow \frac{3x}{3}=-\frac{15}{3}$ Simplify. $\Rightarrow x=-5$ The $x−$ intercept is $-5$, so plot the point $A=(-5,0)$ $y-$ intercept. Substitute $0$ for $x$. $\Rightarrow 3(0)+5y=-15$ Simplify. $\Rightarrow 0+5y=-15$ $\Rightarrow 5y=-15$ Divide each side by $5$. $\Rightarrow \frac{5y}{5}=-\frac{15}{5}$ Simplify. $\Rightarrow y=-3$ The $y−$ intercept is $-3$, so plot the point $B=(0,-3)$. Draw a line through the points A and B.
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