Over what interval is the graph of f(x) = -(x + 8)2 - 1 decreasing?
(-8,infinity)
(8,infinity )
(-infinity ,8)
(-infinity ,-8)

Function is decreasing on (-8,infinity)

Step-by-step explanation:

The given function is

The first derivative is given by

For the function to be decreasing, we have

Divide both sides by -2. Since, we are dividing by a negative number hence, the inequality sign will change.

Subtract 8 to both sides

Therefore, the function is decreasing on (-8,infinity)

First option is correct.

A.-8,infinity

Step-by-step explanation:

i just took the test and got an 100%

1/8 is left? add a bit more info plz