Find the axis of symmetry and the extreme value of f(x) = 1² +21-8. (1).
a. The axis of symmetry is x = 1 and the minimum is at (1,-5).
b. The axis of symmetry is a = 1 and the maximum is at (1,-5).
c. The axis of symmetry is x = -1 and the minimum is at (-1,-9).
d. The axis of symmetry is x = -1 and the maximum is at (-1,-9).