1
QuizMultiple Choice

Square Root Functions — Quiz

Question 1 • College Readiness Mathematics

Which equation is the inverse of y is equal to 2 x squared minus 8 ?

Answer
A
y is equal to the fraction with numerator plus or minus square root of x plus 8 end root and denominator 2
B
y is equal to plus or minus square root of x over 2 plus 8 end root
C
y is equal to plus or minus square root of the fraction with numerator x plus 8 and denominator 2 end root
D
y is equal to the fraction with numerator plus or minus square root of x and denominator 2 plus 4

Explanation

To find the inverse, switch x and y in the original equation: x = 2y² − 8. Add 8 to get x + 8 = 2y², then divide by 2 and take the square root, allowing both positive and negative values: y = ±√((x + 8)/2). This matches choice C.

AI-written and checked against the verified answer.

Next