Which equation is the inverse of y is equal to x squared plus 16 ?
Answer
A
y is equal to x squared minus 16
B
y is equal to x squared minus 4
C
y is equal to plus or minus square root of x minus 16
D
y is equal to plus or minus square root of x minus 16 end root
Explanation
To find the inverse, switch x and y in y = x² + 16, giving x = y² + 16. Solve for y: y² = x − 16, so y = ±√(x − 16). The radical covers x − 16, which is choice D.
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