Practice problem
Which of the following is the vertex of the graph of y=4x2+8x−12y = 4x^2+8x-12y=4x2+8x−12?
(4,−28)(4,-28)(4,−28)
(−4,−28)(-4,-28)(−4,−28)
(−1,−16)(-1,-16)(−1,−16)
(1,−16)(1,-16)(1,−16)
Type a concept, like “slope” or “photosynthesis”.