Point-slope form is:
y - y = m(x - x)
Slope-intercept form is:
y = mx + b
First we need to find the slope. Perpendicular lines have opposite reciprocal slopes, so we need to flip the fraction and multiply by -1. The slope of the given line is 1/5, so the new slope will be -5.
Now put it in point-slope form.
y - (-3) = -5(x - 8)
y + 3 = -5(x - 8)
Now for slope-intercept form, solve for y.
y + 3 = -5x + 40
y = -5x + 37
