i have got this question and am a little confused..can u plz solve...(plz provide all steps)...

i) I=130+ (0.25).(Y)

ii) Y=(4).(I) -500

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- Oct 31st 2010, 06:26 AMkhamaarHow to find the inverse of a function?
i have got this question and am a little confused..can u plz solve...(plz provide all steps)...

i) I=130+ (0.25).(Y)

ii) Y=(4).(I) -500 - Oct 31st 2010, 06:38 AMUnknown008
I(Y) = 130 + 0.25Y

Make Y the subject of formula and then, 'change' the variables, that is replace I by Y and Y by $\displaystyle I^{-1}(Y)$

If that's what you are asking... - Oct 31st 2010, 06:46 AMnerdo
4*(I(Y)-130) = Y

so $\displaystyle I^{-1}(Y)$=4*(Y-130) - Oct 31st 2010, 06:48 AMUnknown008
Yep.

Try the other one now.