y=a(x-h)²＋k关于原点o对称的函数解析式.
y=-a(x+h)²-k
y=a(x-h)²＋k关于顶点对称的函数解析式.
y=-a(x-h)²＋k
y=a(x-h)²＋k关于点M(m,n)对称的函数解析式.
y=-a(x-2m+h)²-k+2n