Answer:
c) 700 (1.04)^x
Explanation:
the formula for an exponential function is a(b)^x
a is the initial value and the initial value is 700, so a = 700.
b is the rate at which the exponential function grows. to find this, substitute the value of 1 as x into each exponential function and use a calculator to find the answers. whichever function outputs y as 728 when x = 1 is the correct answer.
the only function that does so is y = 700(1.04)^x