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would say the easiest way to obtain the equation from the graphs is
find any two pairs of coordinates (x1,y1), (x2,y2),
that is find y1 from the graph for any value of x1, similarly find y2 from the graph for any value of x2.
Apply this formula for getting the equation of the straight line.Remember, this would be applicable only for equations of straight lines, not curves.
In the alternative, if the angle made by the straight line with the positive x-axis is know, say θ, then the slope of the line is given by
m=tan θ.
Find any point y1 for a given x1, then use the following formula to get the equation of the straight line.
thanks for quite reply..
That works great for lines, but I believe (s)he wants all graphs.
u r right. What I am looking for is a way to find a equation from all graphs (curves especially).
Thanks for both ganesh & ricky reply. But I still hoping for any suggestions..
Cheers
Jeff
Hi..I am new to this forum n feel like this forum is real cool.. I have a question for u guys,
How can we actually obtain a equation from graph? For example, a sin(x) graph, if we dunno it is sin(x), how can we derive a equation by the value and coordinate on the graph?
I hope I had made myself clear and understood here..
Cheers
Jeff
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