#1
y=-1/3*3
y=-1
y=-1/3*1/3
y=-1/9
y=-1/3*(-6)
y=2
y=-1/3*3/2
y=-2
-1=-1/3x
1/3x=1:1/3
x=3
2/3=-1/3x
1/3x=-2/3:1/3
x=-2
1/4=-1/3x
1/3x=-1/4:1/3
x=-0,75
1/5=-1/3x
1/3x=-1/5:1/3
x=-0,6
#3
y=-3/4*(-4)
y=3
y=-3/4*2
y=-3/2
-3=-3/4x
3/4x=3:3/4
x=4
3/2=-3/4x
3/4x=-3/2:3/4
x=-2
2=-3/4x
3/4x=-2:3/4
x=-8/3
#4
k=y/x
k=-5/3=-1 2/3
y=-1 2/3x