Square Root Functions Answers
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1
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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
2
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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
3
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
4
Which equation is the inverse of y = 100 – x2?
A
y = plus-or-minus StartRoot 100 minus x EndRoot
B
y = 10 plus-or-minus StartRoot x EndRoot
C
y = 100 plus-or-minus StartRoot x EndRoot
D
y = plus-or-minus StartRoot x minus 100 EndRoot
5
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
6
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.7
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
8
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
9
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 = 2y210
Which equation is the inverse of 2(x – 2)2 = 8(7 + y)?
A
–2(x – 2)2 = –8(7 + y)B
y = one-fourth x squared minus x minus 6
C
y = negative 2 plus-or-minus StartRoot 28 + 4 x EndRoot
D
y = 2 plus-or-minus StartRoot 28 + 4 x EndRoot
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