Well then i am new here and can tell i am going to spend quite some time here aswell :)(adsbygoogle = window.adsbygoogle || []).push({});

I need some help with Finding Logarithmic/exponential equations from points on a graph.

In general, says my math book, you need 2 points on a graph to find 2 unknowns.

fair enough..i covered that all fine.

but now we have 3 unknowns..with 2 points and 1 asymptote

i know an asymptote is a line that the graph approaches but never meets...

i can therefore pick a point and with quite a large amount of accuracy say that that is the 3rd point

for example

say if the graph is traveling close to the asymptote, x = 3 at anything above y = 8 then i just pick a y value(above 8) and assume the x value to be 3.

and i would have a third point....i dont haveto get the answer to 100 decimal places so assuming the x value to be 3 would make quite an accurate answer.

anyways..i have uploaded the question for u to look at...its question 8

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# Finding Logarithmic equations

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