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Function Inverses Answers

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If f(x) and its inverse function, f–1(x), are both plotted on the same coordinate plane, what is their point of intersection?

Question illustration
A
(0, –2)
B
(1, –1)
C
(2, 0)
D
(3, 3)
2
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If and , which expression could be used to verify that is the inverse of ?

Question illustration
A
one-third (one-third x)
Option A
B
Option
Option B
C
Option
Option C
D
Option
Option D
3

If and , which expression could be used to verify that is the inverse of ?

Question illustration
A
one-third (one-third x)
Option A
B
Option
Option B
C
Option
Option C
D
Option
Option D
4

If and , which expression could be used to verify g(x) is the inverse of f(x)?

Question illustration
A
one-fifth (one-fifth x + 5) + 5
Option A
B
One-fifth (5 x minus 25) + 5
Option B
C
StartFraction 1 Over (one-fifth x + 5) EndFraction
Option C
D
5 (one-fifth x + 5) + 5
Option D
5

Which statement could be used to explain why the function h(x) = x3 has an inverse relation that is also a function?

A
The graph of h(x) passes the vertical line test.
B
The graph of the inverse of h(x) is a vertical line.
C
The graph of the inverse of h(x) passes the horizontal line test.
D
The graph of h(x) passes the horizontal line test.
6

Which graph shows a function whose inverse is also a function?

A
On a coordinate plane, two curved graphs are shown. f (x) sharply increases from (negative 0.5, negative 5) to (0, negative 2) and then sharply changes directions and curves down to (0.5, 4.5). The curve then sharply changes direction and goes up through (1, 0). The inverse of f (x) curves slightly up from (negative 5, negative 1) to (negative 2, 0). The curve then sharply changes directions and go to the left toward (negative 3.5, 1). The curve then changes directions and goes through (0, 1) and gradually increases.
Option A
B
On a coordinate plane, 2 parabolas are shown. f (x) opens down and goes through (negative 1, negative 5), has a vertex at (0, 1), and goes through (1, negative 5). The inverse of f (x) opens to the left and goes through (negative 5, 1), has a vertex at (1, 0), and goes through (negative 5, negative 1).
Option B
C
On a coordinate plane, 2 lines are shown. f (x) has a positive slope and goes through (negative 4, negative 3), (0, negative 1), and (2, 0). The inverse of f (x) has a positive slope and goes through (negative 2, negative 2), (negative 1, 0), and (0, 2).
Option C
D
On a coordinate plane, 2 v-shaped graphs are shown. f (x) opens up and goes through (negative 1, 5), has a vertex at (1, 1), and goes through (3, 5). The inverse of f (x) opens right and goes through (5, 3), has a vertex at (1, 1), and goes through (3, 0).
Option D
7

Which function is the inverse of ?

Question illustration
A
f Superscript negative 1 Baseline (x) = one-half x minus three-halves
Option A
B
Option
Option B
C
Option
Option C
D
Option
Option D
8

Which function has an inverse that is also a function?

A
{(–4, 3), (–2, 7), (–1, 0), (4, –3), (11, –7)}
B
{(–4, 6), (–2, 2), (–1, 6), (4, 2), (11, 2)}
C
{(–4, 5), (–2, 9), (–1, 8), (4, 8), (11, 4)}
D
{(–4, 4), (–2, –1), (–1, 0), (4, 1), (11, 1)}
9

Which function has an inverse that is a function?

A
b(x) = x2 + 3
B
d(x) = –9
C
m(x) = –7x
D
p(x) = |x|
10

The function h(x) is given below.h(x) = {(3, –5), (5, –7), (6, –9), (10, –12), (12, –16)}Which of the following gives h–1(x)?

A
{(3, 5), (5, 7), (6, 9), (10, 12), (12, 16)}
B
{(–5, 3), (–7, 5), (–9, 6), (–12, 10), (–16, 12)}
C
{(3, –5), (5, –7), (6, –9), (10, –12), (12, –16)}
D
{(5, 3), (7, 5), (9, 6), (12, 10), (16, 12)}

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Function Inverses Answers — V Algebra 2 S1