Copy of Function Behavior (Increasing, Decreasing, Constant)
Feel free to start by putting the 2 white points anywhere you'd like.
Then slide the slider.
The function is INCREASING at all input (x) values for which its graph is BLUE.
The function is DECREASING at all input (x) values for which its graph is RED.
The function is CONSTANT at all input (x) values for which its graph is BLACK.