AnswersVA-Mathematical AnalysisStep Functions

Step Functions Answers

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1
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What is the value of ?

Question illustration
A
–2
B
–1
C
0
D
1
2
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In the function , which values of the function are equivalent?

Question illustration
A
f(–1) and f(–2)
B
f(1) and f(0)
C
f(–3) and f(–2.1)
D
f(2) and f(1.9)
3

A skate shop rents roller skates as shown in the table below. Roller Skate RentalsTimeCostup to 60 minutes$5up to 2 hours$10up to 5 hours$20daily$25Which graph and function model this situation, where c is the cost, in dollars, of renting skates, and t is the number of hours in a single day that the skates are rented?

A
mc024-1.jpg
Option A
B
mc024-3.jpg
Option B
C
mc024-5.jpg
Option C
D
mc024-7.jpg
Option D
4

Which set of numbers best describes the possible values of x in the equation below?

Question illustration
A
all integer values of x
B
all real number values of x
C
only negative values of x
D
only noninteger values of x
5

For which x-values is the graph below discontinuous?

Question illustration
A
{...–3, –2, –1, 0, 1, 2, 3, ...}
B
{... –3, –1, 1, 3, ...}
C
{...–4, –2, 0, 2, 4, ...}
D
{...–3, –1, 0, 1, 3, ...}
6

Which statement describes the graph of on [0, 3)?

Question illustration
A
The steps are at y = –2 for , at y = –1 for , and at y = 0 for .
Option A
B
The steps are at y = 0 for , at y = 1 for , and at y = 2 for .
Option B
C
The steps are at y = 1 for , at y = 2 for , and at y = 3 for .
Option C
D
The steps are at y = –3 for , at y = –2 for , and at y = –1 for .
Option D
7

What is the value of ?

Question illustration
A
–5
B
–4.6
C
–4.5
D
–4
8

A shipping company charges $6 to ship a package that weighs up to 1 pound and $2 for each additional pound or portion of a pound. Which equation represents the cost, in dollars, of shipping a package that weighs x pounds?

A
, where x > 0
Option A
B
, where x > 0
Option B
C
, where x > 0
Option C
D
, where x > 0
Option D
9

Used books cost $2.25 each. Which expression represents the total number of books that can be purchased for $10?

A
mc021-1.jpg
Option A
B
mc021-2.jpg
Option B
C
mc021-3.jpg
Option C
D
mc021-4.jpg
Option D
10

The United States Postal Service charges $0.55 to mail a first-class letter that weighs up to 1 ounce. Each additional ounce costs $0.15. Which equation represents the situation?

A
mc029-1.jpg
Option A
B
mc029-2.jpg
Option B
C
mc029-3.jpg
Option C
D
mc029-4.jpg
Option D

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Step Functions Answers — VA-Mathematical Analysis