#### Answer

$f(x)=3x-1$

#### Work Step by Step

Since the rate of change of the function is $3$, we know the slope is $3$. Since the initial value is $-1$, we know the y-intercept is $-1$. Thus the equation of the line must be: $f(x)=3x-1$.

Published by
Brooks Cole

ISBN 10:
1305115546

ISBN 13:
978-1-30511-554-5

$f(x)=3x-1$

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