Word  Definition  Examples  

W  
Whole Number  The nonnegative integers including zero  0, 1, 2, 3, 4, 5, 6, ...  
Work backwards  A method that can be used to solve word problems. Read the problem first, then see if it is possible to do the steps starting at the end.  
X  
xaxis  The horizontal axis of the coordinate plane  See graphing lines  
xcoordinate  The first number in an ordered pair. It indicates the distance left or right horizontally from the origin.  (4, 3)
4 is the xcoordinate 

xintercept  The xcoordinate of the point where a line crosses the xaxis (where y = 0).  The xintercept of y = 2x + 4 is  2 

Y  
yaxis  The vertical axis of the coordinate plane  See graphing lines  
ycoordinate  The second number in an ordered pair. It indicates the distance up or down vertically from the origin.  (3, 2) 2 is the ycoordinate 

yintercept  The ycoordinate of the point where a line crosses the
yaxis (where x = 0) For equations in the form y = ax^{2} + bx + c, the c coeffcient is always the yintercept 
The yintercept of y = 3x + 2 is 2 

Word  Definition  Examples  
Z  
Zero  The middle of the number line. Zero is neither negative or positive.  
Zero Matrix  A matrix where all the elements are zero.  
Zero Product Property  For any two real numbers multiplied together so the answer is zero, at least one of the numbers multiplied must be zero. Used when factoring to solve an equation.  If ab = 0 then a or b or both a and b must equal zero  
Zeros  The xintercepts of an equation. The points for which f(x) = 0 
All the places where a graph crosses the x axis. 
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Last Updated: 6/11/2014
© K. A. Shearer 20052014
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