The table represents a quadratic function C(t).


t C(t)
2 4
3 1
4 0
5 1
6 4

What is the equation of C(t)?
C(t) = −(x − 4)2
C(t) = (x − 4)2
C(t) = −x2 + 4
C(t) = x2 + 4