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

$y=3x+8$
A linear function has the form $y=mx+b$, where $m$ is the slope, $b$ is the y-intercept. A linear function can also have the form $y-y_1=m(x-x_1)$, where $m$ is the slope, and $(x_1,y_1)$ is a point on the line. Hence here $m=3,b=8$: $y=3x+8$