If you could explain how to solve this problem that’d be great thanks Algebra II

Graph each system of constraints. Locate the vertices. Then find the values of x and y that will maximize or minimize the objective function.

Taber invested money in an account where interest is compounded every year.he made no withdrawals or deposits. the function a(t)=525(1+0.05)^t represent the amount of money in the account after t years. how much money did taber origanally invested?