The quadratic function is .

For this function a = 12, so the graph opens up and the function has a minimum value.

The minimum value of the function is the y-coordinate of the vertex.

The - coordinate of the vertex is .

        (Substitute the values a = 12 and b = )

                 (simplify)

The y-coordinate of the vertex by evaluating the function for = 0.875 .

                         (Original function)

         ( = 0.875 )

.

The minimum value of the function is .

The function has minimum value.

The minimum value of the function is .