Find the equation of a vertical line Precalculus

y=3

x=3

x=-3

y=-3

y=2

x=2

x=-2

y=-2

y=1

x=1

x=-1

y=-1

y=4

x=4

x=-4

y=-4

y=6

x=6

x=-6

y=-6

y=5

x=5

x=-5

y=-5

y=7

x=7

x=-7

y=-7