5-15. Use what you know about the slopes of parallel and perpendicular lines to write the equation of each line described below. Homework Help a. Write the equation of the line that goes through the point (2, -3) and is perpendicular to the line y = -a + 6. b. Write the equation of the line that is parallel to the line 3x + 2y = 10 and goes through the point (4, 7).