Answer
Slope: $6$
$y$-intercept: $0$
Work Step by Step
The slope-intercept form of a linear equation of a non vertical line is $y=mx+b$, where $m$ is the slope and $b$ is the $y$-intercept.
We use this fact to find the slope and $y$-intercept of $y=6x$
We rewrite using the identity property of addition to add a constant: $y=6x+0$
Since $6$ takes the place of $m$, it is the slope.
Since $0$ takes the place of $b$, it is the $y$-intercept.