SOLUTION
From the funtion
[tex]f\mleft(x\mright)=0.75x+2.25[/tex][tex]\begin{gathered} f\mleft(x\mright)\text{ represents the total amount of money Julie spent on the grocery } \\ \text{store, } \end{gathered}[/tex]While
[tex]x\text{ represents the number of peaches Julie bought }[/tex]