Unit Test — Unit test Answers

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Which equation can be simplified to find the inverse of y = x2 – 7?

x = y squared minus one-seventh

StartFraction 1 Over x EndFraction = y squared minus 7

x = y2 – 7

–x = y2 – 7

Which equation is the inverse of 2(x – 2)2 = 8(7 + y)?

–2(x – 2)2 = –8(7 + y)

y = one-fourth x squared minus x minus 6

y = negative 2 plus-or-minus StartRoot 28 + 4 x EndRoot

y = 2 plus-or-minus StartRoot 28 + 4 x EndRoot

Which of the following describes the graph of compared to the parent square root function?

stretched by a factor of 2, reflected over the x-axis, and translated 9 units right

stretched by a factor of 2, reflected over the x-axis, and translated 9 units left

stretched by a factor of 2, reflected over the y-axis, and translated 9 units right

stretched by a factor of 2, reflected over the y-axis, and translated 9 units left

What is the domain of the square root function graphed below?

x greater-than 1

x greater-than-or-equal-to 10

x greater-than 3

x greater-than-or-equal-to 3

What is the solution of ?

x = 2

x = 3

x = 2 or x = 3

no solution

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