To find the coordinates of the vertex of the quadratic function given by y = x² + 6x + 11, we can use the vertex formula. The vertex of a parabola described by the equation y = ax² + bx + c can be found at the point (h, k), where:
- h = -b / (2a)
- k = f(h) (the value of the function at h)
In this case:
- a = 1
- b = 6
- c = 11
First, we will calculate the value of h:
h = -b / (2a)
= -6 / (2 * 1)
= -6 / 2
= -3
Now, we substitute h back into the original equation to find k:
k = f(h)
= f(-3)
= (-3)² + 6 * (-3) + 11
= 9 - 18 + 11
= 2
Thus, the vertex of the parabola is at the point:
(h, k) = (-3, 2)
This means that the coordinates of the vertex of the graph of the function y = x² + 6x + 11 are (-3, 2).