Answer:
y=(-1/4)x-1/4
Explanation:
Change the function from standard form to slope-intercept form.
y-4x=4 --> y=4x+4
To find a line perpendicular to a given line, find the opposite reciprocal of its numerical values.
4 --> -1/4
4 --> -1/4
y=(-1/4)x-1/4