Identify the initial amount a and the growth factor b in the exponential function f(x)=620•7.8x
a 620, 7.8
b 7.8, 620
c 7.8x, 620
d 620, 7.8x

Given:

f(x) = 620e^7.8x

The standard equation for an exponential function is f(x) = Aoe^bx

where Ao is the initial amount
b is the growth factor

so, in this case, the initial amount is 620 and the growth factor is 7.8