unfavorable outcomes (un-FAYV-ur-uh-buhl
OWT-kuhmz) Any outcomes that are not
represented by an event; the complement of an
event. (p. 338)
unit cost(YOO-nit KAWST) The price per unit of
an item. (p. 150)
unit rate(YOO-nit RAYT) A ratio that compares
an amount, x, to one unit:. (p. 150)upper extreme (UHP-ur ek-STREEM) The upper
end of the “whisker” part of a box-and-whisker
plot; it represents the greatest value of a set of
data. (p. 222)
upper quartile (UHP-ur KWOR-tile) The upper
end of the “box” part of a box-and-whisker plot;
it represents the median of the upper half of a set
of data. (p. 222)
V
variable(VAIR-ee-uh-buhl) A symbol, usually a
letter, used to represent a number. (p. 30)
Venn diagram (VEN DYE-uh-gram) A group of
overlapping circles, each circle representing a
single data set. (p. 224)
vertex (pluralvertices) (VUR-teks [plural
VUR-ti-seez]) 1. The common endpoint of two
rays that form an angle. (p. 240) 2. A point where
two line segments of a polygon intersect. (p. 252)
- The point of intersection of three or more
edges of a polyhedron. (p. 302)
vertical angles (VUR-tuh-kuhl ANG-guhlz) A
pair of opposite angles formed by two
intersecting lines. (p. 245)
volume (VOL-yuhm) The amount of space a three-
dimensional figure occupies or contains. It is
measured in cubic units. (p. 314)
W
wholesale price (HOHL-saylPRISE) The lower
price that stores pay to buy an item. (p. 195)
X
x-axis(EKS-AK-siss) The horizontal number line
in a coordinate plane. (p. 22)
x-coordinate(EKS-koh-OR-duh-nit) The first
number in an ordered pair; it locates a point by
telling how many units to the left or right of the
origin the point is. (p. 22)
Y
y-axis(WYE-AK-siss) The vertical number line in
a coordinate plane. (p. 22)
y-coordinate(WYE-koh-OR-duh-nit) The second
number in an ordered pair; it locates a point by
telling how many units above or below the origin
the point is. (p. 22)
Z
zero pair (ZEER-oh PAIR) A pair of algebra tiles
(a 1 tile and a 1 tile); because 1 (1) 0,
a zero pair can be joined to or removed from a
group of algebra tiles without changing the value
of the group. (p. 7)
Zero Property of Multiplication(ZEER-oh
PROP-ur-tee UHV muhl-tuh-pluh-KAY-shuhn)
The product of 0 and any number is 0.
0 • a0 or a• 0 0. (p. 14)x
1Glossary 437Extended Glossary