Question

the function models the change in yearly value for Anna's cell phone period what is the original value of a cell phone? does the function represent exponential growth or exponential decay?

Answer 1

• The original value of a cell phone is 650

,

• The function represents exponential decay

Step-by-step explanation:

Given the model

`y=650(0.77)^x`

The original value of a cell phone is when x = 0

Substituting x = 0 in the given model, we have:

`\begin{gathered} y=650(0.77)^0 \\ =650(1) \\ =650 \end{gathered}`

The function represents exponential decay, because 0.77 is between 0 and 1.