<em>The axis of symmetry of a parabola is a vertical line that divides the parabola into two congruent halves. The axis of symmetry always passes through the vertex of the parabola . The x -coordinate of the vertex is the equation of the axis of symmetry of the parabola.</em>
f(x) = −4(x − 8)² + 3
for the first function, the vertex is:
x-8=0 ⇒ x= 8, this is the axis of symmetry
h(x)= -(x-3)² + 2
for the second function, the vertex is:
x-3= 0 ⇒ x=3, this is the axis of symmetry, it is also visible on the graph
