Given the log-slider, a log-average would probably make more sense. As in, take the log of all responses, average those, and raise the average to the power of 10.
That makes sense intuitively too - it feels like $10k is twice as 'big' an amount of money as $1k is
That makes sense intuitively too - it feels like $10k is twice as 'big' an amount of money as $1k is