alleryFor function f(x) = ax + b (a ≠ 0), inverse is:
Aa × x + b
Bf⁻¹(y) = (y - b)/a
CRandom
Dax - b
Answer & Solution
Correct answer: B. f⁻¹(y) = (y - b)/a
We have y = ax + b → x.
So y = (y - b)/a.
So f⁻¹(y) = (y - b)/a.
Affine function inverse.
**Same form:** linear with slope 1/a, intercept -b/a.
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