Parallel lines have the same slop, that is the number in front of the X so parallel will both have 3x in the equation. perpendicular is the opposite reciprocal so one would have 3x and the other would have -1/3x and neither is the choice if the equations are neither of these
12% = $42,655.12
.12x = 42655.12
---------------------
0.12 0.12
355,459.33 is the price of the house.
Given that the slope = m
and Point (a, b)
The equation of the line is
y - b = m(x - a)
I'm writing out steps and a graph now to see if I can help explain it.