Unit Test — Unit test Answers
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If c(x) = 4x – 2 and d(x) = x2 + 5x, what is ?
A
4x3 + 18x2 – 10xB
x2 + 9x – 2C
16x2 + 4x – 6D
4x2 + 20x – 222
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What is the value of the following function when x = 0?
A
y = negative 5
B
y = negative 2
C
y = negative 1
D
y = 0
23
The graph of f(x) is shown below.If f(x) and its inverse function, , are both plotted on the same coordinate plane, where is their point of intersection?
A
(0, 6)B
(1, 4)C
(2, 2)D
(3, 0)24
Which function has an inverse that is also a function?
A
g(x) = 2x – 3B
k(x) = –9x2C
f(x) = |x + 2|D
w(x) = –2025
To determine whether a graph of a relation is also a function, Shayla declares that the y-axis is a vertical line and counts the number of times that the graph intersects the y-axis. If the graph has exactly one y-intercept, Shayla concludes that the graph shows a function. In all other cases, she declares that it is not a function. Is Shayla applying the vertical line test correctly?
A
No, because the y-axis is a horizontal line.B
No, because using the y-axis tests only whether x = 0 is mapped to multiple values.C
Yes, because multiple y-intercepts represent multiple x-values being mapped to y = 0.D
Yes, because the y-axis represents all vertical lines of the x-values.Did you find these answers helpful?
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