mohon dijawab no 1 sampai 4 dg caranya

1.
m=y/x = -3/5

2.
m=y/x = 2/4 = 1/2

3.
m=y/x = 3/4

4.
K(2,-3) L(-2,5)
m= y2-y1/x2-x1
=5-(-3)/-2-2
=8/(-4)
=-2