(2, -5)
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d/3 (1st coordinate + last coordinate) + (4*sum of even coordinates) + (2*sum of odd coordinates)
It is the y- coordinate and trust me that's the right answer i was looking 4 it 2 and i found it so ....yeah
In classic geometry, it opens down when the directrix is above the focus.In analytical (coordinate) geometry, if the equation of the parabola isy = ax^2 + bx + c, it opens down if a < 0.
10
There is no single rule. It is a right angled isosceles triangle. Its long side (hypotenuse) is sqrt(2) times the short sides.