Algebra 1

Published by Prentice Hall
ISBN 10: 0133500403
ISBN 13: 978-0-13350-040-0

Chapter 2 - Solving Equations - 2-6 Ratios, Rates, and Conversions - Standardized Test Prep - Page 123: 46



Work Step by Step

In the table, we first examine the point (0,0). This point tells us that if we plug 0 in for x, we should get 0 out for y. In answers A and B, we see that x is being subtracted by a number, so we know that the y value that we get will not be 0. This leaves us with the equations y=x and y=2x. If y=x is true, x and y should always have the same value. If y=2x is true, then the x value should be half of the y value. We see that all of the x values are half of the corresponding y values, so we know that D, y=2x, is correct.
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