Need help please I don’t get it

At the beginning of the year, adrian's savings account balance was \$28$28. each week, he deposits another \$15$15 into that account, and he doesn't spend any of his savings. is his savings account balance proportional to the number of weeks since the start of the year?

Who can me with this algebra for your guys.

Amoving truck rental costs a flat fee of $75 and $2 per mile driven. if you drive a moving truck for 10 miles, how much is the rental for the moving truck?