Question

Which is the vertex of the graph of y=x2+5x+6
Answers:
A. 2.5,0.25
B.2,3
C.-3,-2
D.-2.5,-0.25

Answer 1

The vertex occurs at the intersection of the line of symmetry and the graph of y.

Answer 2

...

Answer 3

@Caylahill, where does the line of symmetry occur?

Answer 4

take the derivative of
y=x2+5x+6
2x+5=0 =>x=-5/2=-2.5
y=(-2.5)^2+5(-2.5)+6
y=6.25-12.5+6=-0.25
(-2.5,-0.25)

Answer 5

@AJ01, good answer, except @Caylahill probably has no idea what a derivative is.