Question

The table represents an exponential function.

x y
1 2
2 2/5
3 2/25
4 2/125

Answer 1

Hello,
$f(1)=2\\ f(2)= \dfrac{2}{5} =2*5^{-1}\\ f(3)= \dfrac{2}{25} =2*5^{-2}\\ f(4)= \dfrac{2}{125} =2*5^{-3}\\\\ \boxed{f(x)= 2*5^{-x}}$