Answer:
[tex] f(x) = \frac{Px}{100}[/tex]
Step-by-step explanation:
Let P% of the transaction amount is charged in the account.
So, if the transaction amount is x, then the charge for that transaction will be
[tex]\frac{ Px }{ 100 }[/tex].
Therefore, if f(x) represents the amount Isabel is charged for the transaction then we can write [tex] f(x) = \frac{ Px }{ 100 }[/tex], where P% is the rate of charge. ( Answer )