Which terms are used to describe the level of a graph?

The correct choice for describing the level of a graph is "high, moderate, low." This terminology is commonly used in various fields to represent the relative levels or intensities of different variables plotted on a graph.

In the context of data visualization, using high, moderate, and low allows for a clear understanding of where a particular data point falls in relation to others. For instance, a 'high' level indicates a peak or significant level of activity or performance, while 'low' implies minimal activity or performance, and 'moderate' represents a middle ground. This type of classification helps quickly convey the overall trends and variations in data without needing to refer to exact numerical values, making it accessible for a broad audience.

The other terms listed do not accurately reflect the same type of level categorization—while increasing, decreasing, and stable refer to the changes over time or trends within the data rather than a level at a specific point. Additionally, zero can indicate a state of no activity, but it does not fit into the conceptual framework of categorizing data levels into high, moderate, or low.