To increase by 4% the original price, we have to mulitply by 1.04
For the first year, the price would be:
[tex]\begin{gathered} 2500\cdot1.04 \\ \rightarrow2500\cdot1.04^1 \end{gathered}[/tex]For the second year, the price would be:
[tex]\begin{gathered} 2500\cdot1.04\cdot1.04 \\ \rightarrow2500\cdot1.04^2 \end{gathered}[/tex]Fo the third,
[tex]\begin{gathered} 2500\cdot1.04\cdot1.04\cdot1.04 \\ \rightarrow2500\cdot1.04^3 \end{gathered}[/tex]For the x-th year,
[tex]2500\cdot1.04^x[/tex]Therefore, the function that represents the exponential growth of the price is:
[tex]y=2500\cdot1.04^x[/tex]