At the beginning of year 1, Zack invests $700 at an annual compound interest rate of 3%. He makes no deposits to or withdrawals from the account.
Which explicit formula can be used to find the account's balance at the
beginning of year 5? What is the balance?

Idon't see any graph, however the graph of the function : f(x) = x²-2x+3 is a parabola: 1) open upward (since a> 0)2) it intersects y-axis in 3 (y=3)3) its axis of symmetry is x = +1 ( -b/2a)4) it's minimum is y = -2, so its vertex is (1,-2)5) it doesn't intersect the x-axis since discriminant < 0