Question

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.

Answer 1

See below

Explanation:

Answer 2

see below

Explanation:

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.