For a quadratic equation of the form \(y = k{(x - a)^2} + b\), the following diagram shows the main properties: If k > 0, the vertex is a minimum turning point If k < 0, the vertex is a maximum ...

As this is \(a\textgreater0\) the parabola has a minimum turning ... point and the equation of the axis of symmetry. Since \(k = - 1\), then this parabola will have a maximum turning point at ...