How about some more particulars about your problem with graph of quadratic equations from data? I might be able to throw some light on. If you are not able to get a good help or some one to sit and sort out your difficulty or if it is too costly, then there might be another way out. There are some good algebra software that you can try. I tried them out myself. It came across to me as brilliant as any tutor can be. I would opt Algebra Buster for the kind of elucidation that you are looking for. What is smart about it is that it tutors you to the solutions rather than just giving the answer. Why not try it out?
I too have had problems in graphing equations, trigonometry and inequalities. I was informed that there are a number of programs that I could try out. I tried out several but then the finest that I discovered was Algebra Buster. Merely typed in the problem and clicked the ‘solve’. I got the answer at once. On top of it, I was directed through to the answer by an effortlessly understandable step-by-step process. I have relied on this program for my problems with Remedial Algebra, Pre Algebra and Basic Math. If I were you, I would surely go for this Algebra Buster.
factoring polynomials, graphing equations and reducing fractions were a nightmare for me until I found Algebra Buster, which is truly the best algebra program that I have ever come across. I have used it through many math classes – Intermediate algebra, Algebra 2 and Basic Math. Simply typing in the algebra problem and clicking on Solve, Algebra Buster generates step-by-step solution to the problem, and my math homework would be ready. I highly recommend the program.