given the functions f(x) = 2x2 - 8x, g(x) = x2 - 6x + 1, and h(x) = –2x2

given the functions f(x) = 2x2 − 8x, g(x) = x2 − 6x + 1, and h(x) = –2x2, rank them from least to greatest based on their axis of symmetry.

the answer is following:
 
1). f(x)=2x2 - 8x (-8 at x=2)
 
2). d(x)=x2 - 6x + 1 (-3.5 at x=1.5)
 
3). h(x)=-2x2 (0 at x=0)