If the rate of inflation is 3.9% per year the future praise P (T) and dollars I’ll pay for an item can’t be modeled by the following exponent function, where the TV is the number of youth of today

Twas bryllyg, and y^e slythy toves

Did gyre and gymble in y^e wabe:
All mimsy were y^e borogoves;
And y^e mome raths outgrabe.