Not-A-Scam IQ Test

Easily get your IQ with a test that only contains a single question! It's just a math question, so be prepared to do small calculations.

Using the linear function below, what is \(f^{-1}(x)\) if \(x = 4\)?

\(f(x) = \frac{4}{5}x - 2\)

The results are in...

You score with 0 IQ!

You are in the 0% percentile!

You are a...

Perfect Idiot