Nose points right, opens to the left.
down
right
It is like the letter U.
Upwards: it is cup shaped, not cap shaped.
In that case it opens upwards.
DOWN!
LEFT
down
Downwards
right
It is like the letter U.
Down
Upwards: it is cup shaped, not cap shaped.
left
No, a parabola is the whole curve, not just a part of it.
In that case it opens upwards.
It does both depending if it is positive or negative