The equation below describes a parabola. If a is negative, which way does the parabola open?y = ax2A.UpB.DownC.LeftD.RightSUBMITarrow_backPREVIOUS

The equation below describes a parabola. If a is negative, which way does the parabola open?y = ax2

Which equation describes a parabola that opens left or right and whose vertex is at the point (h, v)?A.y = a(x - v)2 + hB.y = a(x - h)2 + vC.x = a(y - v)2 + hD.x = a(y - h)2 + vSUBMITarrow_backPREVIOUS

What is the standard form of the equation of a parabola that opens up or down?A.y = a(x - h)2 + vB.x = ay2 + by + cC.x = a(y - v)2 + hD.y = ax2 + bx + cSUBMITarrow_backPREVIOUS

In which direction does the parabola y=–9(x–8)2+5 open?updownrightleftSubmit

The graph of parabola opens downwards, if _______