In a function of the form y= ax^2 +bx + c which of the following is always true? A. If a is positive, the parabola will have a m
inimum value. B. If c is zero, the parabola will be centered around the y-axis. C. If c is positive, there won't be any x-intercepts. D. If c is negative, there won't be a y-intercept.
