The program will ask what each of the necessary variables equals. This project is in case you aren't sure how to graph those pesky parabolas for Algebra! There are two formulae available, depending on what equation you have. Hit "v" to see your variables. Press the UP arrow key to reset. IMPORTANT: double-check if your "h" value is negative. If you see a plus sign, yes. If you see a minus sign, it's POSITIVE.
Just a little remix, to relax ;)