a) The parabola opens downwards
b) the x intercept is the value of x at the point where the curve touches the x axis. It is
x = 4
x intercept = 4
It can be written as
(4, 0)
the y intercept is the value of y at the point where the curve touches the y axis. It is y = - 8
y intercept = - 8
It can be written as (0, - 8)
c) The coordinates of the vertex are the values of x and y at the bottom of the curve. They are x = 4, y = 0
Vertex = (4, 0)
d)The axis of symmetry divides the curve into two equal halves. Thus, equation of axis of symmetry is
x = 4
