Which is CLOSEST to the curve of best fit for the data shown? A) y = -16x2 - 51x + 9 B) y = -0.02x2 + x + 23 C) y = -10x2 - 0.5x + 8 D) y = -0.6x2 - 0.02x + 11
For larger x, the value of the squared term will be more significant than the other terms, so you can estimate it in your head. Look at x = 10 for easy numbers.
I usually use MATLAB to graph stuff. It's definitely not optimal.
mac? don't think so ... this program doesn't have a lot of functionality, but it does make nice graphs on the quick and you can save them in .jpeg format for upload here.