If Jesus adds $50 each week to the account that currently holds $325, then after 1 week the account will hold 325 + 50 = $375.
After 2 weeks, the account will hold 375 + 50 = $425.
After 3 weeks, the account will hold 425 + 50 = $475.
And so on.
In general, after n weeks, the account will hold 325 + 50n dollars