Jason kept track of the number of songs he downloaded each week for 10 consecutive weeks. This function models the number of songs he downloaded, where x is the number of weeks:
N(x) = -3(x − 4)^2 + 60.
Plot the axis of symmetry and the vertex for this function.
Since this is written in vertex notation the vertex is (4, 60). The axis of symmetry is equal to the x - coordinate of the vertex which is the vertical line x = 4.
