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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 coordinates of the point. The first number (5) specifies the distance of the point from the y-axis. The second is the (9) coordinate and specifies the distance of the point from the x-axis.