(1)y=1/x
x=1, y=1 x=1, y=1
x=2, y=0.5 x=1/2, y=2
x=3, y=1/3 x=1/3, y=3
x=4, y=0.25 x=1/4, y=4
x=5, y=0.2 x=1/5, y=5
x=-1, y=-1 x=-1, y=-1
x=-2, y=-0.5 x=-1/2, y=-2
x=-3, y=-1/3 x=-1/3, y=-3
x=-4, y=-0.25 x=-1/4, y=-4
x=-5, y=-0.2 x=-1/5, y=-5
(2)y=-1/x