Question

Which equations model exponential decay?Select each correct answer. y=2(0.20)x y=0.25(2)x y=0.55(0.91)xy=4.2(1.25)x

Answer 1

The equations that can model exponential decay is;

`\begin{gathered} y=2(0.20)^x \\ y=0.55(0.91)^x \end{gathered}`

Step-by-step explanation:

Given the equations in the attached image.

We want to identify which equations model exponential decay.

Exponential decay is of the form;

`\begin{gathered} y=a(r)^x \\ \text{where;} \\ r<1 \end{gathered}`

From the given equations the equations that can model exponential decay is;

`\begin{gathered} y=2(0.20)^x \\ y=0.55(0.91)^x \end{gathered}`

Since the base of both exponential is less than 1.