# Chapter 5 - Linear Functions - 5-2 Direct Variation - Practice and Problem-Solving Exercises - Page 297: 31

y=-20x

#### 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=$\frac{1}{4}$k (Divide both sides by $\frac{1}{4}$) -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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