f(v) = 8v(v  10) is a Quadratic Function in Factored Form.
It's graph is a parabola that opens up b/c a = +8.
It's Zeros are v = 0 and v = 10. These are also it's vintercepts.
It's Axis of Symmetry is halfway between the Zeros at v = 5.
It's Vertex is (5,f(5)) = (5,8(5)(510)) = (5,200).
It's Vertex Form Equation is f(v) = 8(v  5)^2  200.
It's Standard Form Equation is f(v) = 8v^2  80v.
2/21/2014

Steve S.