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Converting equations to linear equations? 
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#1
Jul714, 09:21 AM

P: 217

Hi, Let's say I have a function f(x) = 2*log(x). I know scientists sometimes plot f(x) on the y axis, but then instead of plotting x on the xaxis they plot log (x) such that the graph becomes linear.
How would i plot a function f(x)= 2*log(x) such that it is linear ? My attemps  Perhaps i don't understand the logic? I tried doing this: i set log(x)=t, then i have the equation y=2*t which is linear, Then i find the values from the equation y=2*t t y 1 2 2 4 3 6 4 8 Then i plot a graph y on the Y axis and ln(x) on the x axis, but i don't get a linear graph when plotting this :( 


#2
Jul714, 09:25 AM

P: 217

I saw from a book that the equation c=constant * T^(1/2) would be plotted as a straight line if you set T^(1/2) =x so you get the graph f(x)=constant*x, and then plot y against T^(1/2) so I was wondering how that worked  the book did not show a working example of how it was plotted.



#3
Jul714, 10:10 AM

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#4
Jul714, 10:44 AM

P: 217

Converting equations to linear equations?
But if i plot c vs t^(1/2) in the equation c=2*T^(1/2) then i get a straight line. So is it not possible to do the same with the log function?
And what's the point of graphing a nonlinear equation as a linear graph? I guess it always tells us that a variable is proportional to the yvalue? 


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Jul714, 11:03 AM

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