Question

Determine whether the graph of y = x2 + 4x - 7 has a maximum or minimum point, then find the maximum or minimum value.
Answer
Minimum; (-11, -2)
Maximum; (-11, -2)
Maximum; (-2, -11)
Minimum; (-2, -11)

Answer 1

since the second degree of x is positive, its curved down right? does that mean a max or min?

Answer 2

its has minimum value

Answer 3

min?

Answer 4

2x+4=0 and second derivative >0 hence minimum value
x=-2
then put x=-2 in y
we get y=-11