Unit Test — Unit test Answers
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21
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Consider the function . What transformation results in ?
A
translating 5 units downB
translating 10 units downC
reflecting across the x-axisD
reflecting across the y-axis22
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If the function y = sinx is transformed to , how do the amplitude and period change?
A
The amplitude increases, and the period decreases.B
The amplitude increases, and the period increases.C
The amplitude decreases, and the period decreases.D
The amplitude decreases, and the period increases.23
Review the table.
A
Negative one-half, negative StartFraction StartRoot 2 EndRoot Over 2 EndFraction, negative StartFraction StartRoot 3 EndRoot Over 2 EndFraction
B
Negative StartFraction StartRoot 3 EndRoot Over 2 EndFraction, negative StartFraction StartRoot 2 EndRoot Over 2 EndFraction, negative one-half
C
One-half, StartFraction StartRoot 2 EndRoot Over 2 EndFraction, StartFraction StartRoot 3 EndRoot Over 2 EndFraction
D
StartFraction StartRoot 3 EndRoot Over 2 EndFraction, StartFraction StartRoot 2 EndRoot Over 2 EndFraction, one-half
24
On the interval 0 ≤ x ≤ 2π, what are the x-intercepts of y = sinx?
A
0, StartFraction pi Over 2 EndFraction, and StartFraction 3 pi Over 2 EndFraction
B
0, π, and 2πC
StartFraction pi Over 2 EndFraction and StartFraction 3 pi Over 2 EndFraction
D
π and 2π only25
Consider the function y = asin(bx), where a > 0 and b > 0. Which change compresses the graph vertically?
A
Increase a.B
Decrease a.C
Increase b.D
Decrease b.Did you find these answers helpful?
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