IN MATH: 1. n. a number line. 2. usually the number line which is vertical and perpendicular to the x-axis in a Cartesian coordinate system; the line x = 0. EX. The point (0,-3) is on the y-axis and 3 units lower than 0.

IN ENGLISH: 1. as defined above.

APPLICATION: See list 230.

1. At what point does the x-axis intersect the y-axis?

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