lol r u in y11 or y12?
Anways this is how u do it.
formula is : x square =4ay
Therefore, 4a=8
a=2 ( the number 2 indicates how much it moves up or down)
Vertex is : (0,1)
focus is : ( 0, -1)
Parabola is concave down with a focus of : (0, -1) and a directrix of y=3
easy 2 unit lol. ask if u...