Algebra 1: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281140
ISBN 13: 978-0-13328-114-9

Chapter 5 - Linear Functions - 5-2 Direct Variation - Practice and Problem-Solving Exercises - Page 305: 31



Work Step by Step

Since the general form of a direct variation is y=kx,. lets substitute the value of x and y into this equation: -5=1/4k (Divide both sides by 1/4) -20=k Now plug in this value of k into the standard form of a direct variation: y=-20x This is our equation the relates both x and y for this situation.
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