Algebra 2 (1st Edition)

Published by McDougal Littell
ISBN 10: 0618595414
ISBN 13: 978-0-61859-541-9

Chapter 8 Rational Functions - Prerequisite Skills - Page 548: 5

Answer

8

Work Step by Step

We plug in the given point to find the constant of variation. Since the equation will be for direct variation, we can then plug this in for $a$ in the equation $y=ax$. (Note, the y-intercept is 0). Hence, we find: $$ a=\frac{4}{-1}=-4$$ Thus, when $x=-2$: $$y=-4(-2)=8$$
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