Question

Choose the equation below that corresponds to the graph shown.
A.y = -3x2 - 12x - 14
B.y = 3x2 + 12x - 14
C.y = -3x2 + 12x - 14
D.y = 3x2 - 12x - 14

Answer 1

c

the vertex is at (-2,-2)

Answer 2

looks like we can narrow it down a bit; the sign in front tells us whehter it opens up or down; +up and -down

the last number tells us where it crosses the y axis; which in this case is the same for each one so we have to determine what the middle term adds to our arsenal

Answer 3

the + or - just flips it over the y axis; but i cant recall which is which; so thomasj's vertex is useful as well