Functions Modeling Change: A Preparation for Calculus, 5th Edition

Published by Wiley
ISBN 10: 1118583191
ISBN 13: 978-1-11858-319-7

Chapter 1 - Linear Functions and Change - Exercises and Problems for Section 1.1 - Skill Refresher: S5

Answer

For $x = \frac{1}{2}$ the answer is $y = \frac{1}{10}$, for $ y = -5$ the answer is $x = -25$.

Work Step by Step

We receive the first result by inserting $x = \frac{1}{2}$ in $x = 5y$: $ \frac{1}{2} = 5 y \Rightarrow \frac{1 }{2 \cdot 5} = y \Rightarrow \frac{1}{10} = y$. We receive the second result by inserting $y = -5$ in $x = 5y$: $ x = 5 \cdot (-5) \Rightarrow x = - 5 \cdot 5 \Rightarrow x = -25$.
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