What do you think the graph of \(y = \cos 2x ... point when \(y = 1\) and minimum turning point when \(y = - 1\) The graph looks like: Now try the example questions below.

As this is \(a\textgreater0\) the parabola has a minimum turning point. The y coordinate when \(x=-1\) is -25 so the minimum turning point is (-1, -25). From the equation \(y = - {(x + 4)^2} ...