Your task is to come up with three quadratic equations that will create parabolas that goes through both the Angry Bird on the slingshot and the Pig.[br][br]At least one of these parabolas must stay on the screen at all times.

Why do you think the [i]a[/i] value must always be negative in this situation?[br][br]For one of your parabolas that is always on the screen, note the vertex and axis of symmetry.[br][br]For a parabola that goes out of the top of the screen, can you think of a way to work out how high it goes at it's highest point?