Assertion: parabola's vertex | /r/HasProperty | maximum point
Facets:
value: if #a<0#
type: OTHER
value: in a parabola
type: LOCATION
Source sentences:
text: A parabola that opens upward contains a vertex that is a minimum point; a parabola that opens downward contains a vertex that is a maximum point.
text: In a parabola that opens downward, the vertex is the maximum point.
text: The vertex is also the maximum point if a < 0, or the minimum point if a > 0.
text: If #a<0# , the vertex is the maximum point and the parabola opens downward.