Question

The graph of the function f(x) = -(x+6)(x + 2) is shown

Answer 1

Answer:

The answer is A

Step-by-step explanation:

Answer 2

Answer:

The function is increasing for all real values of x where

x < –4.

Step-by-step explanation:

we have

$f(x)=-(x+6)(x+2)$

This is a vertical parabola open downward (the leading coefficient is negative)

The vertex (h,k) represent  a maximum

The roots of the function (or x-intercepts) are x=-6 and x=-2

The x-coordinate of the vertex is the midpoint of the roots

so

$h=(-2-6)/2=-4$

The y-coordinate of the vertex is

substitute the x-coordinate of the vertex in the quadratic equation

$k=-(-4+6)(-4+2)$

$k=-(2)(-2)$

$k=4$

The vertex is the point (-4,4)

The function is increasing in the interval (-∞,-4)

The function is decreasing in the interval (-4,∞)