On these

1) find the slope of the line passing through the the following points: (−12, −56), (−57, 39).

2)without drawing the graph, find the coordinates of its intersection with the x- and y-axes.
a
y=−2.4x+9.6

3) without drawing the graph, find the coordinates of its intersection with the x- and y-axes.
b
y=1.2x+6