Functions Increasing and Decreasing

What is the increasing interval on the function shown?

Over what interval is this function constant?

• −5 < x < ∞

• −3 < x < 4

• 4 < x < ∞

• −5

The intervals in which the function f given by f (x) = x² – 4x + 6 is increasing is

• none of these

The function f (x) = tan x – 4x is strictly decreasing on

• none of these

• none of these

The interval on which the function f (x) = 2x³ + 9x² + 12x – 1 is decreasing is:

What is the interval of increase and decrease in the following function.

• Increasing at (-8, -6) and (-3, 1)