tolong pakai caranya

m=-y/x
m= -(-4)/-2
m=- 2

tegak lurus m1×m2=-1

berarti yg tegak lurusnya 1/2

semoga membantu mu yah

m1 = -y/x = -(-4)/-2 = 4/-2= -2
m2=..?

m1 x m2 = -1
-2 x m2 = -1
m2 = -1/-2
m2= 1/2