Can any1 help me out. See the graph says thatit it has been plotted for LT but looking on the table on the lhs it's clear that it is plotted using L and T square still it gives a parabola how come? Pintu sir i didnt understand your explaination ... U said that we r plotting l^2 against T and hence it becomes y^2=4ax but l is along x axis and T along y axis and also we r not plotting l^2 its just T dat is squared. Can someone plz give me a detailed explaination.