Square Root Functions Answers
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1
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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
2
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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
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
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
5
What is the domain of the function ?
A
Negative infinity less-than x less-than infinity
B
Negative 4 less-than-or-equal-to x less-than infinity
C
0 less-than-or-equal-to x less-than infinity
D
4 less-than-or-equal-to x less-than infinity
6
Which equation is the inverse of ?
A
y = one-fifth x squared + six-fifths x + eleven-tenths
B
y = 3 plus-or-minus StartRoot 5 x + seven-halves EndRoot
C
Negative 5 y minus 4 = negative (x + 3) squared minus one-half
D
y = negative 3 plus-or-minus StartRoot 5 x + seven-halves EndRoot
7
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
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
9
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
10
Which equation can be simplified to find the inverse of y = 2x2?
A
StartFraction 1 Over y EndFraction = 2 x squared
B
y = one-half x squared
C
–y = 2x2D
x = 2y2Did you find these answers helpful?
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