A function is shown.

f(x) = x² + 2x - 1

Which graph represents this function?

f(x) = x² + 2x - 1

Which graph represents this function?

**In the function f(x) = x² + 2x - 1,**

- the constant term, -1, is the y-intercept of the graph

- the x² term is positive, meaning the parabola opens upward

- also, the x-coordinate of the vertex is

-b -2

---- = ----- = -1 is the x-coordinate of the vertex

2a 2(1)

**y-intercept is -1**

parabola opens up

x-coordinate of vertex is -1

parabola opens up

x-coordinate of vertex is -1

**Graph C.)**{the one on the top right}

**Ask Algebra House**