Unit Test — Unit test Answers

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Which function has an inverse that is also a function?

A
g(x) = 2x – 3
B
k(x) = –9x2
C
f(x) = |x + 2|
D
w(x) = –20
24

Which of the following is an odd function?

A
f(x) = x3 + 5x2 + x
B
f (x) = StartRoot x EndRoot
Option B
C
f(x) = x2 + x
D
f(x) = –x
25

The value, V(m), of a comic book m months after publication has an average rate of change of –0.04 between m = 36 and m = 60. Which statement must be true?

A
The value of the comic book decreased by a total of $0.04 between m = 36 and m = 60.
B
The value of the comic book increased by a total of $0.04 between m = 36 and m = 60.
C
The value of the comic book decreased by an average of $0.04 each month between m = 36 and m = 60.
D
The value of the comic book increased by an average of $0.04 each month between m = 36 and m = 60.

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