line l contains points (3,5) and (7,9). Point P has coordinates (2,10)

Answer 1

Well then the slope of line L is 4/4 = 1.

So if you want a parallel line, then it has slope 4.

if you want a perpendicular line, the it has slope (-1/4)

Let M be this slope.

THe intercept is then B = 5 - M(3) = 5 - 3m

the equation shall be y = Mx + (5-3m) where

M is the slope you have picked above, depending

on perpendicular or parallel