Final answer:
Yes, the given function y = -4.8 * 4^x is an exponential function with an initial value of -4.8 and a base of 4.
Step-by-step explanation:
Yes, the given function y = -4.8 * 4^x is an exponential function. The initial value can be found by substituting x = 0 into the function, which yields y = -4.8 * 4^0 = -4.8 * 1 = -4.8. So, the initial value is -4.8. The base of the exponential function is the number that is raised to the power of x, which is 4 in this case. Therefore, the base is 4.