Precalculus (10th Edition)

Published by Pearson
ISBN 10: 0-32197-907-9
ISBN 13: 978-0-32197-907-0

Chapter 3 - Linear and Quadratic Functions - 3.1 Properties of Linear Functions and Linear Models - 3.1 Assess Your Understanding - Page 129: 51

Answer

a. See attached picture b. They have the same slope c. $y=\frac{875}{4}x$ d. $(-\infty, +\infty)$ e. See attached picture f. $m=\frac{875}{4}$

Work Step by Step

a. See attached picture b. $(8, 1750), (16,3500), (32,7000),$ and $(64, 14000)$ At point $(8, 1750)$ and $(16,3500)$ $m=\frac{3500-1750}{16-8}=\frac{875}{4}$ At point $(16,3500)$ and $(32,7000)$ $m=\frac{7000-3500}{32-16}=\frac{875}{4}$ At point $(32,7000)$ and $(64,14000)$ $m=\frac{14000-7000}{64-32}=\frac{875}{4}$ c. $y-y_1=m(x-x_1)$ $\enspace$ $y-1750=\frac{875}{4}(x-8)$ $\enspace$ $y=\frac{875}{4}x$ d. The domain of a function is the set of input or argument values for which the function is real and defined. The function has no undefined points nor domain constraints. Therefore, the domain $-\infty \lt x \lt \infty$ e. See attached picture f. From $(b)$, $m=\frac{875}{4}$
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