Chapter 3 - Graphing Linear Functions - 3.5 - Graphing Linear Equations in Slope-Intercept Form - Exercises - Page 142: 16

Slope $m=4$ and y-intercept $b=-7$.

The slope-intercept form is $y=mx+b$ where $m$ is the slope and $b$ is the y-intercept. Given that $y=4x-7$ which can be written as $y=4x+(-7)$. Comparing with the slope-intercept form, we get $m=4$ and $b=-7$.