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Y - Math terms glossary

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y-axis The vertical number line in a coordinate graph. The line in the coordinate plane, usually vertical, or in space, containing those points whose first coordinates (and third, in space) are 0.
In a flat plane it looks like this. In space it looks like this.
y-coordinate   The second coordinate of an ordered pair or ordered triple.
Ex: in the coordinate pair (3,-2), the negative two is the y-coordinate.
The y coordinate is always the second one in an ordered pair.
yard (yd)  A unit of length in the U.S system of measurement equal to 3 feet or 36 inches.
y-intercept The y-coordinate of a point where a graph crosses the y-axis.
It's the spot where the line crossed the y axis.
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