posted by joanieday on .
How do I read the equation (function) y=-0.03x^2+0.14x+1.43?
Do I have to complete the square to find the vertex, max., min., etc.? This function is part of a word problem that I am trying to do. I would appreciate any help.
Well, you could multiply everything by 100 to get an easier function:
in which you could try and use the quadratic theorem
[-b +/- sqrt(b^2-4ac)]/2a
-14 +/- sqrt(196-(-1716)/-60
[-14 +/- sqrt(1912) ]/-6
You cant simplify too much. But you get the idea from here. Is this the answer you were looking for?