To find a perpendicular line using the equation of the original line, we just need to transform the slope.
The equation of the original line is:

So, the slope is 1/4. To get the slope of a perpendicular line, we invert it and change its sign, so the new slope is:

With the slope and a point, (-8,5), we can use the slope-intercept form for a line, which is:

Where y0 and x0 are the coordinates of the point. So:
