The correct option is B y
The y-coordinate of a point is the perpendicular distance of the point from the x-axis. For example, let (5,9) be a point on the cartesian plane. The two numbers in parentheses are the x and y co-ordinates of the point. The x co-ordinate 5 specifies the perpendicular distance of the point from the y-axis. The y co-ordinate 9 specifies the perpendicular distance of the point from the x-axis.