Sergio wants to write equations in the form y = mx + b for the lines passing through
point P that are parallel and perpendicular to line h. First he finds the slopes of these 2
lines. What could he do next to find the y-intercepts?

A. Multiply the slope by the x-coordinate and add the y-coordinate to the product.

B. Multiply the slope by the y-coordinate and subtract the result from the x-coordinate

C. Solve the proportion m/b = y/z for b.

D. Substitute the slope and the coordinates of point P in y = mx + b and then solve for b for each equation.