Question

Use the quadratic equation y = x2 + 3x + 9.

Where does the vertex of the parabola lie?



A.
on the y-axis


B.
below the x-axis


C.
above the x-axis


D.
on the x-axis

Answer 1

@LynFran

Answer 2

its A right

Answer 3

\[y=f(x)=ax^2+bx+c\\x_{vertex}=\frac{-b}{2a}\\y_{vertex}=f(\frac{-b}{2a})\]

Answer 4

no its not A its below the axis

Answer 5

above the x axis

Answer 6

so C hmm ok