Upwards: it is cup shaped, not cap shaped.
down
It is like the letter U.
right
Open to the right. Like the sign for a proper subset, or a rounded version of the less than symbol, <.
Nose points right, opens to the left.
DOWN!
down
It is like the letter U.
right
left
No, a parabola is the whole curve, not just a part of it.
Open to the right. Like the sign for a subset, or a rounded version of the less than symbol, <.
Open to the right. Like the sign for a proper subset, or a rounded version of the less than symbol, <.
LEFT
positive.
Nose points right, opens to the left.
In that case it opens upwards.