Algebra 2 Common Core

Published by Prentice Hall
ISBN 10: 0133186024
ISBN 13: 978-0-13318-602-4

Chapter 2 - Functions, Equations, and Graphs - 2-2 Direct Variation - Practice and Problem-Solving Exercises - Page 72: 53


The origin can be used to test whether a linear equation is a direct variation function because if it is plugged into a linear equation and the equation becomes $0=0$, it is a direct variation.

Work Step by Step

A direct variation: $y=\frac{7}{3}x$ $0=\frac{7}{3}(0)$ $0=0$ Not a direct variation: $y=8x+6$ $0=8(0)+6$ $0=6$
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