a quadratic in vertex form is represented as [tex]a(x-h)^{2} +k[/tex] where (h,k) is the vertex and the maximum or minimum of the function is the y=value in the vertex
(h,k) in this function is (-1/3, 2/3) you take the opposite sign of the x-value for h.
if a is positive the function has a minimum
if a is negative the function has a maximum
a is positive so it has a minimum value
The vertex of its graph is ( 1/3, 2/3 ) - Incorrect the vertex is (-1/3, 2/3)
The maximum value is 2/3 when x = -1/3 -incorrect the function has no maximum
The minimum value is 2/3 when x = - 1/3
