Glven the line segment RT, with endpolnt R(6,9) and midpoint A(-3,7)
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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:
If a>0, then the parabola opens up;
If a<0, then the parabola opens down.
The coordinates of focus are: