f(x) is 1.8 when x=1(adsbygoogle = window.adsbygoogle || []).push({});

f(x) is 0.5 when x=2.8

f(x) is 1.5 when x=1.2

what is the best estimate for the value of (f^-1)'1?

I now that f'(1) is -1.6 because of linear apporximation:

(2.8-1.2)/(.5-1.5)=1.6/-1=-1.6

so then (f^-1)'1 = 1/1.6?

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# Homework Help: Estimating values

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