Consider the exponential function \(\displaystyle{y}={a}\cdot{b}^{{x}}\) it is an exponential growth if \(b>1\) and exponential decay if 0 It is given that \(\displaystyle{y}={0.3}\cdot{0.5}^{{x}}\)

Since \(\displaystyle{b}={0.5}{<}{1}\), the given function represents an exponential decay.