What is the slope-intercept form for each equation in this system? compare the slopes and y-intercepts to describe the graph of the system. 3x - 4y = 28 4x + 10y = 20 a) y = 3 4 x − 7; y = −2 5 x + 2; one line b) y = -3 4 x − 7; y = −2 5 x + 2; parallel lines c) y = 3 4 x − 7; y = 2 5 x + 2; intersecting lines d) y = 3 4 x − 7; y = −2 5 x + 2; intersecting lines