#### Answer

0

#### Work Step by Step

To locate any point with coordinates (a,b), starting from the origin,
we move a units to the left (a negative) or right (a positive),
then move b units up (b positive) or down (b negative).
If a =0, we do not move left/right,
If b=0, we do not move up/down.
If the point is on the x-axis, then b=0.
Any point on the x-axis has y-coordinate equal to zero.