Intermediate Algebra (6th Edition)

Published by Pearson
ISBN 10: 0321785045
ISBN 13: 978-0-32178-504-6

Chapter 3 - Section 3.3 - Graphing Linear Functions - Vocabulary, Readiness & Video Check: 5

Answer

y, f(x), x

Work Step by Step

To find an x-intercept, we must find the value of x that is associated with a y-coordinate of 0. Therefore, we must set $y=f(x)=0$ (recall that f(x)=y, and is a way to say that y is a function of x). We then solve for x to find the x-intercept. Example: $y=f(x)=x+4$ $0=x+4$ Subtract 4 from both sides. $x=-4$, so the x-intercept is (-4,0).
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