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Mathematics 22 Online
OpenStudy (anonymous):

what is the common term for the set of all points with x- coordinate zero?

Directrix (directrix):

In the x-y (Cartesian) plane, if the x-coordinate of an ordered pair is zero, then the point will be found on the y-axis.

Directrix (directrix):

The equation of the y-axis is this: x = 0. |dw:1444265013669:dw|

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