# Math Dictionary wxyz

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**W**

**Week :**A time period of 7 days.

**Whole :**All of something. Complete.

**Whole Number :**The numbers {0, 1, 2, 3, ...} etc.

There is no fractional or decimal part. And no negatives.

**Width :**The distance from side to side.

This page is about Math Dictionary x.

**X**

**x :**This is used as a variable in Algebra.

**X-axis :**One of the two intersecting lines used to establish the coordinates of points in the Cartesian plane; in that plane, the line whose equation is

y = 0; in space the axis perpendicular to the yz-plane.

**X-coordinate :**The first coordinate in any (x,y) ordered pair; the number represents how many units the point is located to the left or right of the y-axis; also called abscissa.

**X-intercept :**The point at which the graph of a relation intercepts the x-axis. The ordered pair for this point has a value of y = 0.

This page is about Math Dictionary y.

**Y**

**Y-axis :**It is the vertical line.One of the two intersecting lines used to establish the coordinates of points in the Cartesian plane; in that plane, the line whose equation is x = 0; in space the axis perpendicular to the xz-plane.

**Y-coordinate :**The second coordinate in any (x,y) ordered pair; the number represents how many units the point is located above or below of the x-axis; also called ordinate.

**Y-intercept :**The point at which a graph of a relation intercepts the y-axis. The ordered pair for this point has a value of x = 0.

**Year :**A period of time in which the Earth makes a complete revolution around the sun.

There are 365 days in a normal year and 366 days in a leap year.

This page is about Math Dictionary z.

**Z**

**Z-axis :**A line perpendicular to the plane determined by the x-axis and y-axis at their point of intersection; this axis is used as a reference to determine the third component of the ordered triple (x, y, z).

**Z-coordinate :**The third coordinate in any (x,y,z) ordered triple; the number represents how many units the point is located above or below of the xy-plane.

**Zero :**The whole number between -1 and 1, with the symbol 0.Shows that there is no amount.

**Zero (of a function) :**Where a function equals the value zero (0).

Also called "root".

**Zero product property :**If a and b are real numbers, then ab = 0

if and only if a = 0 or b = 0, or a and b = 0.

**Math dictionary wxyz**

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