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Equation of a Line and point of Intersection of two lines

Question asked by yekollu on Nov 30, 2009
Latest reply on Nov 30, 2009 by boespflu
I need to write a Program to find the equation of a line passing through the points (X1,Y1) and (X2,Y2), and predict the value of X when Y=0.
Similiarly the Equation of a 2nd line passing through (X3,Y3) and (X4,Y4)....
Finally find out the point of intersection of the 1st Line and 2nd line...

The Equation must be of the Form y=mx+c

Please Please help me out, i have been raking my brains over this.... problem is i dont know how to work with Matlab either

Thanking you in Advance