Which of the following is correct for the vertex of the parabola
f(x) = 2x2 + 8x - 12 ?
A)There is a local minimum at
(-2, -20)
B)There is a local maximum at
(-2, -20)
C)There is a local minimum at
(2, -20)
D)There is a local maximum at
(2, -20)

Question

Which of the following is correct for the vertex of the parabola 
f(x) = 2x2 + 8x - 12 ?
A)There is a local minimum at 
(-2, -20)
B)There is a local maximum at 
(-2, -20)
C)There is a local minimum at 
(2, -20)
D)There is a local maximum at 
(2, -20)

directrix · Answer

f(x) = 2x^2 + 8x - 12

If the graph looks like that shown on the attached file, then which option is correct?

@thatcher1416

directrix · Answer

Do you see a y-value on the graph that is smaller than -20?

directrix · Answer

@thatcher1416