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 3 - Graphing Linear Functions - Chapter Review - Page 166: 22

Answer

The $x-$ intercept is $2$. The graph is shown below.

Work Step by Step

The given equation is $\Rightarrow -5x+y=-10$ Add $5x$ to each side. $\Rightarrow -5x+y+5x=-10+5x$ Simplify. $\Rightarrow y=5x-10$ The slope-intercept form is $\Rightarrow y=mx+b$ $y-$ intercept is $b=-10$. Plot the $y-$ intercept $A=(0,-10)$. The slope is $m=5$. Slope $m=\frac{rise}{run}=\frac{5}{1}$ The next point is $1$ unit right and $5$ unit up from the point $(0,-10)$. Plot the point $B=(1,-5)$. Draw a line through the two points. From the graph the line crosses the $x-$ axis at $C=(2,0)$. Hence, the $x-$ intercept is $2$.
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