Function Inverses Answers

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Which function is the inverse of ?

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A
f Superscript negative 1 Baseline (x) = one-half x minus three-halves
Option A
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Option D
5

Which statement could be used to explain why f(x) = 2x – 3 has an inverse relation that is a function?

A
The graph of f(x) passes the vertical line test.
B
f(x) is a one-to-one function.
C
The graph of the inverse of f(x) passes the horizontal line test.
D
f(x) is not a function.
6

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

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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
7

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)}
8

If , what is ?

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Option
Option A
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Option
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Option D
9

If f(x) and g(x) are inverse functions of each other, which of the following shows the graph of f(g(x))?

A
On a coordinate plane, a straight line has a positive slope and goes through (negative 2, negative 1), (0, 0), and (4, 2).
Option A
B
On a coordinate plane, a straight line has a positive slope and goes through (negative 3, negative 3), (0, 0), and (3, 3).
Option B
C
On a coordinate plane, a straight line has a negative slope and goes through (negative 4, 2), (0, 0), and (4, negative 2).
Option C
D
On a coordinate plane, a straight line has a negative slope and goes through (negative 3, 3), (0, 0), (3, negative 3).
Option D
10

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

A
On a coordinate plane, 2 curves are shown. f (x) is a curve that starts at (0, 0) and opens down and to the right in quadrant 1. The curve goes through (4, 2). The inverse of f (x) starts at (0, 0) and curves up sharply and opens to the left in quadrant 1. The curve goes through (2, 4).
Option A
B
On a coordinate plane, 2 parabolas are shown. f (x) opens up and goes through (negative 2, 5), has a vertex at (0, negative 2), and goes through (2, 5). The inverse of f (x) opens right and goes through (5, 2), has a vertex at (negative 2, 0), and goes through (5, negative 2).
Option B
C
On a coordinate plane, two v-shaped graphs are shown. f (x) opens down and goes through (0, negative 3), has a vertex at (1, 3), and goes through (2, negative 3). The inverse of f (x) opens to the left and goes through (negative 3, 2), has a vertex at (3, 1), and goes through (negative 3, 0).
Option C
D
On a coordinate plane, two curved graphs are shown. f (x) sharply increases from (negative 1, negative 4) to (0, 2) and then changes directions and curves down to (1, 1). At (1, 1) the curve changes directions and curves sharply upwards. The inverse of f (x) goes through (negative 4, negative 1) and gradually curves up to (2, 0). At (2, 0) the curve changes directions sharply and goes toward (1, 1). At (1, 1), the curve again sharply changes directions and goes toward (3, 1).
Option D

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