Intermediate Algebra: Connecting Concepts through Application

Published by Brooks Cole
ISBN 10: 0-53449-636-9
ISBN 13: 978-0-53449-636-4

Chapter 1 - Linear Functions - 1.3 Fundamentals of Graphing and Slope - 1.3 Exercises - Page 52: 60


incorrect Slope: $7$ $y$-intercept: $(0,-4)$

Work Step by Step

Rearrange the equation into slope-intercept form. $7x-y=4$ $-y=-7x+4$ $y=7x-4$ The slope is the coefficient of $x$, and the constant term that is added is the $y$ value in the $y$-intercept of $(0,y)$. Slope: $7$ $y$-intercept: $(0,-4)$ The student was incorrect. The student did not divide both sides by $-1$ when $y$ was negative.
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