Part A
we have a vertical parabola open downward
Part B
Find out the y-intercept (value of y when the value of x=0)
looking at the graph
For x=0
the value of y=-4
therefore
the y-intercept is (0,-4)
Find out the x-intercepts (values of x when the value of y=0)
looking at the graph
For y=0
the value of x=2
therefore
the x-intercept is (2,0)
Part c
The equation of the axis of symmetry is equal to the x-coordinate of the vertex
The vertex is (2,0)
therefore
the axis of symmetry is x=2
Part d
the vertex is (2,0)