The quadratic function is .

For this function a = 9.7, 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 = 9.7 and b = )

             (simplify)

The y-coordinate of the vertex by evaluating the function for = 0.670 .

                     (Original function)

       ( = 0.670 )

.

The minimum value of the function is .

The function has minimum value.

The minimum value of the function is .