Answer
See below.
Work Step by Step
a) The rate of change is: $\frac{f(y)-f(x)}{y-x}={2-11}{0-(-3)}=-3=a$.
b) $f(x)=2$ at $x=0$, thus $b=2$. Hence $f(x)=-3x+2$.
College Algebra 7th Edition
by Stewart, James; Redlin, Lothar; Watson, Saleem
Published by
Brooks Cole
ISBN 10:
1305115546
ISBN 13:
978-1-30511-554-5
Chapter 2, Functions - Section 2.5 - Linear Functions and Models - 2.5 Exercises - Page 232: 32
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