The vertex vertex form of the quadratic f is
Where
a is the coefficient of x^2
(h, k) are the coordinates of the vertex of the curve
By comparing them
h = 2 and k = -4
a) The vertex point is (2, -4)
If the coefficient of x^2 is negative, that means the graph is opened downward
b) The direction of the graph is downward
The axis of symmetry of the quadratic function is a vertical line passes through the v
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