Find the inverse function f⁻¹(x) for f(x) = (x + 4) / 5.

✓ Correct Answer: Option A

Replace f(x) with y: y = (x + 4) / 5. Swap x and y: x = (y + 4) / 5. Multiply by 5: 5x = y + 4. Subtract 4: y = 5x - 4. So, f⁻¹(x) = 5x - 4.