4
QuizMultiple Choice

Inverse of a Function — Quiz

Question 4 • Precalculus

For the function k times x is equal to negative 1 over 16 x minus 8 , what is the inverse function k inverse times x ?

Answer
A
k inverse times x is equal to negative 16 times open paren x minus 8 close paren
B
k inverse times x is equal to negative 16 x plus 8
C
k inverse times x is equal to negative 16 x minus 8
D
k inverse times x is equal to negative 16 times open paren x plus 8 close paren

Explanation

Write the function as y = −x/16 − 8, then interchange x and y: x = −y/16 − 8. Add 8 to both sides and multiply by −16 to solve for y, giving y = −16(x + 8). Therefore, the inverse is k⁻¹(x) = −16(x + 8), choice D.

AI-written and checked against the verified answer.

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