This has a vertex at (1,-5) and otherwise looks like y=x^2; the two points one x unit away from the vertex are also 1 y unit away, the two points two away are 4 units higher, etc.
[tex]y = (x- 1)^2 - 5[/tex]
That's in vertex form. We're not shown any choices; let's multiply this out.
[tex] y = x^2 - 2x - 4[/tex]
Either one of those.
