If the vertices of an ellipse are at (1,5) and (1,-5) and (3,0) is a point on the ellipse, what is the ellipse equation

Ebuka's monthly rent is $750. if ebuka pays the rent late, his landlord charges 4% interest per week that the payment is late. write a function that gives the total cost r(t), in dollars, of ebuka's rent if he pays it t weeks late.