Precalculus: Mathematics for Calculus, 7th Edition

Published by Brooks Cole
ISBN 10: 1305071751
ISBN 13: 978-1-30507-175-9

Chapter 2 - Section 2.5 - Linear Functions and Models - 2.5 Exercises - Page 196: 28

Answer

f(x) = -12x+100

Work Step by Step

1. Remember we are writing the function in the form f(x) = ax+b. 2. Since a = rate of change and rate of change in this case = -12, we have f(x) = 12x+b. 3. Since the initial value is when x = 0 (the y-intercept), which = b, we know that b = 100 4. We now have f(x) = -12x+100
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