# FNGR 1 | Lesson 1 | Practice 1

Which of the following is an exponential function? Choose all that apply

a) $$f(x)=8 \left( \Large \frac{1}{3} \right) ^{x}$$

b) $$f(x)=8x$$

c) $$f(x)=x^8$$

d) $$f(x)=8^x$$

e) $$f(x)=3^x$$

f) $$f(x)=2(3.5)^x$$