The equation of a parabola is:

If a>0, then the parabola opens up;
If a<0, then the parabola opens down.
The coordinates of focus are:
Answer:
BBBBBBBBBB
Step-by-step explanation:
Answer:
The answers are at A, D, and E
Step-by-step explanation:
It's right on Edge
Answer: 0=-4.9t²+19.6t+24.5
Step-by-step explanation:
