Unit Test — Unit test Answers
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21
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Which graph shows ?
A
Option
B
Option
C
Option
D
Option
22
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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.23
If and are inverse functions of each other and , what is ?
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Option
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Option
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Option
D
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24
The function f(x) = 14.5 – 0.25x2 is used to model the curve of a train tunnel, where x is the distance from the center of the tunnel, and the x-axis represents the ground. The mathematical range for the function is the set of real numbers less than or equal to 14.5.
A
The reasonable range is the set of positive real numbers.B
The reasonable range is the set of positive whole numbers.C
The reasonable range is the set of real numbers between 0 and 14.5 inclusive.D
The reasonable range is the set of whole numbers between 0 and 14.5 inclusive.25
The graph shows two functions, f(x) and g(x).If the functions are combined so that h(x) = f(x) – g(x), then the domain of the function h(x) is x ≥ .
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