Write an equation of a hyperbola shifted 3 units up and 6 units down.

The correct option is;

C. The rate at which the account is increasing

Step-by-step explanation:

The given parameters are;

The rate at which the compound interest on the savings account is compounded = quarterly

The expression given by her banker to find the amount in the account after t years = 4,200(1.05)^(4t)

Therefore, the 1.05 = The rate at which the account is increasing