Assertion: parabola's equation | /r/CapableOf | generate parabola
Facets:
Source sentences:
text: The equation 4a(y-k)=(x-h)2 generates a parabola which opens upward if a>0 and opens downward if a<0.
text: The equation 4a(x-h)=(y-k)2 generates a parabola which opens to the right if a>0 and opens to the left if a<0.