Square Root Functions Answers
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1
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Which equation can be simplified to find the inverse of y = 5x2 + 10?
A
x = 5y2 + 10B
StartFraction 1 Over y EndFraction = 5 x squared + 10
C
–y = 5x2 + 10D
y = one-fifth x squared + one-tenth
2
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What is the domain of the square root function graphed below?
A
x greater-than 1
B
x greater-than-or-equal-to 10
C
x greater-than 3
D
x greater-than-or-equal-to 3
3
What is the domain of the function ?
A
x greater-than-or-equal-to negative 7
B
x greater-than-or-equal-to negative 6
C
x greater-than-or-equal-to 6
D
x greater-than-or-equal-to 7
4
Which equation is the inverse of y = 16x2 + 1?
A
y = plus-or-minus StartRoot StartFraction x Over 16 EndFraction minus 1 EndRoot
B
y = StartFraction plus-or-minus StartRoot x minus 1 EndRoot Over 16 EndFraction
C
y = StartFraction plus-or-minus StartRoot x EndRoot Over 4 EndFraction minus one-fourth
D
y = StartFraction plus-or-minus StartRoot x minus 1 EndRoot Over 4 EndFraction
5
Which equation is the inverse of y = 2x2 – 8?
A
y = plus-or-minus StartRoot StartFraction x + 8 Over 2 EndFraction EndRoot
B
y = StartFraction plus-or-minus StartRoot x + 8 EndRoot Over 2 EndFraction
C
y = plus-or-minus StartRoot StartFraction x Over 2 EndFraction + 8 EndRoot
D
y = StartFraction plus-or-minus StartRoot x EndRoot Over 2 EndFraction + 4
6
Which equation can be simplified to find the inverse of y = x2 – 7?
A
x = y squared minus one-seventh
B
StartFraction 1 Over x EndFraction = y squared minus 7
C
x = y2 – 7D
–x = y2 – 77
If the domain of the square root function f(x) is , which statement must be true?
A
7 is subtracted from the x-term inside the radical.B
The radical is multiplied by a negative number.C
7 is added to the radical term.D
The x-term inside the radical has a negative coefficient.8
If , which inequality can be used to find the domain of f(x)?
A
StartRoot one-half x EndRoot greater-than-or-equal-to 0
B
One-half x greater-than-or-equal-to 0
C
One-half x minus 10 greater-than-or-equal-to 0
D
StartRoot one-half x minus 10 EndRoot + 3 greater-than-or-equal-to 0
9
If , which inequality can be used to find the domain of f(x)?
A
StartRoot x minus 3 EndRoot greater-than-or-equal-to 0
B
x minus 3 greater-than-or-equal-to 0
C
StartRoot x minus 3 EndRoot less-than-or-equal-to 0
D
x minus 3 less-than-or-equal-to 0
10
What is the domain of the square root function graphed below?
A
x less-than-or-equal-to negative 1
B
x greater-than-or-equal-to negative 1
C
x less-than-or-equal-to 0
D
x greater-than-or-equal-to 0
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