Answer
Slope $m=6$ and y-intercept $b=0$.
Work Step by Step
The slope-intercept form is
$y=mx+b$ where $m$ is the slope and $b$ is the y-intercept.
Given that $y=6x$ which can be written as $y=6x+0$.
Comparing with the slope-intercept form, we get
$m=6$ and $b=0$.