4/5 = 16/20 Think of it this way ~ 5 in the 4/5 times 4 will equal the 20 in ?/20 ( 5 x 4 = 20 ) So, you will take that 4 again, and multiply that by the 4 in 4/5 ( 4 X 4 = 16 ) = 16/20
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.