Which system of equations could be used to solve for the point of intersection of the lines on the graph? A) y = 3 4 x + 1 and − 4 3 x + 9 B) y = 3 4 x − 1 and − 4 3 x + 9 C) y = 3 4 x − 1 and − 3 4 x + 9 D) y = 4 3 x − 1 and − 4 3 x + 9