Answer:
• The original value of a cell phone is 650
,
• The function represents exponential decay
Explanation:
Given the model
[tex]y=650(0.77)^x[/tex]
The original value of a cell phone is when x = 0
Substituting x = 0 in the given model, we have:
[tex]\begin{gathered} y=650(0.77)^0 \\ =650(1) \\ =650 \end{gathered}[/tex]
The function represents exponential decay, because 0.77 is between 0 and 1.
