Question

etermine whether the graph of y = x2 + 4x − 7 has a maximum or minimum point, then find the maximum or minimum value.

A. Minimum; −2
B. Maximum; −2
C. Maximum; −11
D. Minimum; −11

Answer 1

Minimum = -2

Answer 2

minimum: -11

Answer 3

x = -2, y = -11

Answer 4

it lies at x=-2

Answer 5

you can complete the square pretty easily here
x^2+4x-7=
x^2+4x+4-4-7=
(x+2)^2-11
a(x-h)^2+k
where (h,k) is the vertex
so your vertex is at (-2, -11)
-11 is the min value because a>0