Match the terms with the definitions.
1.
the second component in an ordered pair used to locate a point on a plane, also called the ordinate.
2.
a symbol or letter representing one or more numbers.
3.
two sets a and b (a u b) is the sets consisting of the elements that are in either a or b, or in both of the sets.
4.
the set of natural numbers with zero included. the set of whole numbers is written {0, 1, 2, 3, 4, }.
5.
the horizontal number line in the coordinate plane.

a.
union of sets
b.
variable
c.
whole numbers
d.
x-axis
e.
y-coordinate