f(x)

Great app. Good for comparison of functions. Suggestions: 1)I don't know if this can be done-can you get it to plot non-functional relationship between 2 variables (Example: y^2+x^2-2x+y=1)(where one variable is not necessarily a function of the other). 2)The space allocated for the plot is too small. I think the plot should occupy more area. 3)I think it should also tell the co-ordinates of a selected point. 4)Can you also make a panel of available operations (sine ,log, etc) to drag and drop