AnswersTX-Algebra I B-CRUnit Test

Unit Test — Unit test Answers

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Which equation represents the function f(x) = (1.6)x after it has been translated 5 units up and 9 units to the right?

g
g(x) = (1.6)x + 5 − 9
g
g(x) = (1.6)x + 5 + 9
g
g(x) = (1.6)x − 9 + 5
g
g(x) = (1.6)x + 9 + 5
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a
all real numbers
a
all real numbers less than 0
a
all real numbers greater than 0
a
all real numbers less than or equal to 0
3

f(x) = g(x) = – 3

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T
The range of g(x) is , {y | y > 0} and the range of f(x) is {y | y > –3}.
T
The range of g(x) is , {y | y > 3} and the range of f(x) is {y | y > 0}.
T
The asymptote of g(x) is the asymptote of f(x) shifted three units down.
T
The asymptote of g(x) is the asymptote of f(x) shifted three units up.
4

The graph of f(x) = (2.5)x and its reflection across the x-axis, g(x), are shown.

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a
all real numbers
a
all real numbers less than 0
a
all real numbers greater than 0
a
all real numbers less than or equal to 0
5

Which is the graph of ?

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A
Option
B
Option
C
Option
D
Option
6

Which is a shrink of an exponential growth function?

Question illustration
f
f(x) = (3)x
Option f
f
f(x) = 3(3)x
f
f(x) =
Option f
f
f(x) =
Option f
7

Which is the graph of g(x) = – 2?

Question illustration
A
Option
Option A
B
Option
Option B
C
Option
Option C
D
Option
Option D
8

The table shows a company’s profit based on the number of pounds of food produced.

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$
$5,150
$
$5,300
$
$10,150
$
$11,000
9

Drew creates a table of ordered pairs representing the width and area of a dog pen.

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D
Drew has 36 feet of fencing and wants to represent the possible areas of the dog pen for possible widths.
D
Drew has a maximum of 81 feet of fencing to use around the pen, and the length must be twice the width.
D
Drew is building a rectangular dog pen with a length that is up to 4 feet more than the width and has a perimeter of at least 77 feet.
D
Drew wants to build a dog pen that is between 7 feet and 11 feet in width and uses, at most, 18 feet of fencing.
10

Pherris is graphing the function f(x) = 2(3)x. He begins with the point (1, 6). Which could be the next point on his graph?

(
(2, 12)
(
(2, 18)
(
(2, 7)
(
(3, 7)
11

An account is opened with $7,595.96 with a rate of increase of 2% per year. After 1 year, the bank account contains $7,746.90. Assuming no deposits or withdrawals are made, which equation can be used to find y, the amount of money in the account after x years? (Round money values to the nearest penny.)

y
y = 7,746.90(1.02)x
y
y = 7,746.90(0.02)x
y
y = 7,595.96(1.02)x
y
y = 7,595.96(0.02)x
12

An exponential function f(x) is reflected across the x-axis to create the function g(x). Which is a true statement regarding f(x) and g(x)?

T
The two functions have the same initial value.
T
The two functions will cross each other on the axis.
T
The two functions have reciprocal output values of each other for any given input value.
T
The two functions have opposite output values of each other for any given input value.
13

Which is a stretch of an exponential growth function?

Question illustration
f
f(x) =
Option f
f
f(x) =
Option f
f
f(x) =
Option f
f
f(x) =
Option f
14

The data in the table represents the predicted price of a gallon of milk, y, for number of years, x.

Question illustration
y
y = ax + b
y
y = ax2 + b
y
y = abx
y
y = a + bx
15

Which function represents exponential decay?

Question illustration
f
f(x) =
Option f
f
f(x) =
Option f
f
f(x) = 4
Option f
f
f(x) = 4
Option f

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