Question

define axis of symmetry
a line that divides the graph into two equal parts, i.e. cuts the graph in half
where the parabola touches or intersects the x - axis, also called the x - intercept
the highest y - value on the graph
the highest or lowest point on the graph

Explanation:

The axis of symmetry of a parabola (a quadratic graph) is a line that splits the graph into two mirror-image, equal halves. The other options describe x-intercepts, maximum values, and vertices respectively, which are distinct features.

Answer:

A line that divides the graph into two equal parts. i.e. cuts the graph in half