Hello,
I have plotted some data (shown in file "2A2"), and tried to fit lines to it, getting an okay fit using quadratic. But I realise it is completely wrong when I did a plot of the equation (in file "plot"). y = -0.007x2 + 7333.9x - 2E+09 is a "frown", and has turning point at x = 523850, meaning a negative gradient for all x > 523850. But my data is not this way!
Thanks for your help!!
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