To analyze the function on the interval $(-∞, 1)$:

Looking at the graph, here's what we can observe:

1. Interval $(-∞, 1)$:
   • From $-∞$ to $x = -4$, the graph is not shown, but assuming the behavior continues from $-4$, the function increases from $x = -4$ to $x = -3$.
   • From $x = -3$ to $x = 1$, the function decreases.

Therefore, on the interval $(-∞, 1)$, the function is decreasing.

Would you like further details or have any additional questions? Here are 5 related questions you might find useful:

1. What is the significance of analyzing the behavior of functions over infinite intervals like $(-∞, 1)$?
2. How do we determine the limits of a function as it approaches $-∞$?
3. Can a function that is decreasing on one interval become increasing on another? How does this affect the overall behavior?
4. What methods can be used to analytically determine the intervals of increase and decrease without graphing?
5. How do discontinuities or sharp turns in the graph of a function affect the determination of increasing and decreasing intervals?

Tip: When analyzing functions over infinite intervals, pay attention to the trends in the graph as it moves towards those extreme values.