Question

Which of the following BEST describes the best Exponential function below.

Answer 1

`y=4\cdot0.5^x`

Explanation:

An exponential decay describes the process of reducing an amount by a consistent percentage rate over a period of time. It can be represented by the equation:

`\begin{gathered} y=ab^x \\ \text{where,} \\ \text{ y= final amount} \\ \text{ a= original amount} \\ \text{ b= decay factor b<1} \end{gathered}`

Therefore, the function that best describes the function above would be:

`\begin{gathered} \text{ Decay: } \\ y=4\cdot0.5^x \end{gathered}`