Find the slope and the y-intercept of the line.
y=9x-3

Basically, every linear function can be expressed as:
, where is the slope.

So, the slope is 9 in your case.

To find y-intercept of the line you have to set because line intercepts y-axis when is equal to zero:


From here we can say that is the y-interception.
So, y-interception is -3 in your case.