Using the standard slope-intercept form for an equation of a line y = mx + b
where m is the slope and b the y-intercept.
line with m= -8, passing thru Pt(3,5)
y = -8x + b |using ordered pair Pt(3,5) to solve for b
5 = -8*3 + b
29 = b
y = -8x + 29