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Which two types of graphs illustrate and analyze measurements or trends over time?
Choose 2 answers.
The two graph types specifically designed to illustrate and analyze measurements or trends over time are the control chart and the run chart. A run chart displays data points in chronological order, making it useful for identifying trends, shifts, cycles, or patterns in a process over time. A control chart builds on this concept by adding upper and lower control limits, which help determine whether observed variation is normal or signals a possible process issue. These charts are widely used in quality improvement, operations monitoring, and time-based performance analysis. A check sheet is a structured data collection form, not a graph used to analyze trends over time. A Pareto chart shows categories ranked by frequency or impact, often to highlight the most important problems, but it does not primarily track change over time. Because the question asks for graph types that illustrate and analyze measurements or trends across time, the correct answers are control chart and run chart.