Beginning Algebra, 11th Edition

Variation, 475
constant of, 476
direct, 475–476
inverse, 477
Velocity problem, 565
Venn diagrams, 598
Vertex of a parabola, 325,
580
finding, 581–582
Vertical angles, 122
Vertical line, 192–193
equation of, 193, 216
graph of, 192–193
slope of, 203
Vertical line test for graphs of
functions, 231
Volume, 126
of a cube, 512
of a pyramid, 127
of a rectangular box, 126
of a sphere, 127, 512

Whole numbers, 2, 28, 30

Word phrases

for addition, 41–42

to algebraic expressions, 23, 72, 104

for division, 54–55

to expressions, 72

for multiplication, 54–55

to numerical expressions, 41–42, 54–55

to ratios, 130

for subtraction, 41–42

Word statements to equations, 55–56

Words to symbols conversions, 18–19,

41–42, 54–55

Work rate problems, 469

x-axis, 180

x-intercepts, 190

of a parabola, 581–583

y-axis, 180

y-intercept, 190, 211, 212

of a parabola, 581–582

Zero

division involving, 52

multiplication by, 49

Zero denominator in a rational

expression, 421

Zero exponent, 304

Zero-factor property, 392, 554

Z

Y

X

W

Index I-7