Answer:
y=5
Explanation:
The slope-intercept form is the best way to display a line when you have both the slope and intercept of it. It can be explained as the following

Where x and y refer to the coordinates of a point on the line, m refers to the slope and b refers to the y-intercept. In our case, we can insert our slope and y-intercept:

And simplify it to the above answer, as anything multiplied by 0 results in a 0. Hope this helps :D