Final answer:
As per the equation, g has an average rate of change of zero over the interval t = 1.
Step-by-step explanation:
To find the interval over which g has an average rate of change of zero, we need to find when the derivative of g is equal to zero.
Taking the derivative of g(t), we get g'(t) = -2(t-1).
Setting g'(t) equal to zero and solving for t, we have -2(t-1) = 0.
This gives us t-1 = 0, so t = 1.
Therefore, g has an average rate of change of zero over the interval t = 1.