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 Aug 4 comment Find equation for a function of form: $f(x) = Ae^{kx} \cos(Bx+C)+D.$? Thanks - I seem to get approximately the same answer as Ross, but I'm not entirely confident - can somebody else confirm that? May 10 comment How to calculate hyperbola from data points? Great, thanks!! May 10 comment How to calculate hyperbola from data points? Can you explain that further? I don't really understand what you mean. Apr 7 comment If a quadratic is reflected on the y axis, why does $b=0$? Of course! Thanks! Apr 7 comment Find equation of quadratic when given tangents? Perfect, thankyou! Apr 7 comment Find equation of cubic function with gradient? Never mind! I got it! Thanks so much! Apr 7 comment Find equation of cubic function with gradient? I've got the 4 equations, but I can't figure it out from there. It's impossible to sub 3 of the equations into the fourth, as you just end up with a huge equation still with the 4 separate unknowns. What am I missing? How do I find the solution? Apr 6 comment Find equation of cubic function with gradient? Sorry, I've added coordinates! Mar 13 comment Calculate derivatives on Casio Graphics Calculator? Thanks! I can find the numerical value of the derivative using that function, but what I really need is the actual function itself. Is there any way I can (quickly) work backwards from the numerical value to confirm the derivative I have calculated manually is correct? Mar 13 comment Calculate derivatives on Casio Graphics Calculator? Casio CFX-9850GC Plus