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The domain of a quadratic function will always be…
( -∞, ∞ )
The range of a quadratic function that is facing up —> \/
[y-coordinate of vertex , ∞ )
The range of a quadratic function that is facing down —> /\
( -∞ , y-coordinate of vertex ]
when a parabola opens up, then a = ?
a = (+)
[EX. —→ a = 3x2 ]
when a parabola opens down, then a = ?
a = (-)
[EX. —→ a = -6x2 ]
Note 
Flashcard (20)