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: 33

Answer

$y=-\frac{A}{B}x+\frac{C}{B}$ $\text{Slope}=\frac65$ $\text{y-intercept}=\frac{9}{5}$

Work Step by Step

$$Ax+By=C$$ $$By=-Ax+C$$ $$\frac{By}{B}=-\frac{Ax}{B}+\frac{C}{B}$$ $$y=-\frac{Ax}{B}+\frac{C}{B}$$ $$y=-\frac{A}{B}x+\frac{C}{B}$$ Now it is in slope-intercept form. $$-6x+5y=9$$ Using above results: $$\text{Slope}=-\frac{A}{B}=-\frac{-6}{5}=\frac65$$ $$\text{y-intercept}=\frac{C}{B}=\frac{9}{5}$$
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