Math Problem Statement

Determine the intervals on which the function is​ increasing, decreasing, and constant.

Determine the intervals on which the function is increasing, decreasing, and constant.

Solution

To determine the intervals where the function is increasing, decreasing, or constant, let's analyze the given graph:

Intervals of Interest:

  1. Increasing: A function is increasing where the graph moves upward as xx increases.
  2. Decreasing: A function is decreasing where the graph moves downward as xx increases.
  3. Constant: A function is constant where the graph remains horizontal (flat) and does not move up or down.

Analysis of the Graph:

  • From x=8x = -8 to x=6x = -6, the graph is moving upward, so the function is increasing in this interval.
  • From x=6x = -6 to x=4x = -4, the graph moves downward, so the function is decreasing in this interval.
  • From x=4x = -4 to x=2x = -2, the graph is flat, so the function is constant in this interval.
  • From x=2x = -2 to x=0x = 0, the graph moves upward again, so the function is increasing in this interval.
  • From x=0x = 0 to x=2x = 2, the graph is constant (flat) again, so the function is constant in this interval.
  • From x=2x = 2 onward (as xx \to \infty), the graph remains constant at y=2y = 2, so the function is constant from x=2x = 2 to infinity.

Summary:

  • Increasing: (8,6)(-8, -6) and (2,0)(-2, 0)
  • Decreasing: (6,4)(-6, -4)
  • Constant: (4,2)(-4, -2), (0,2)(0, 2), and (2,)(2, \infty)

Let me know if you need more details or have further questions!

Here are 5 related questions to extend this topic:

  1. What is the significance of local maxima and minima in the context of this graph?
  2. How would you find the derivative of this piecewise function?
  3. Can you identify any points of inflection from the graph?
  4. How does the horizontal behavior at x=2x = 2 relate to limits as xx \to \infty?
  5. How do intervals of increasing and decreasing correspond to the derivative's sign?

Tip: When analyzing graphs, always look at the slope (whether it's positive, negative, or zero) to determine where the function is increasing, decreasing, or constant.