Which of the following sets of figures demonstrates a consistent trend in density values?

The correct choice demonstrates a consistent trend in density values because the figures increase steadily with each value. Specifically, the density values of 0.8587, 0.8718, and 0.8983 show a clear progression where each subsequent value is greater than the one before it. This indicates a reliable upward trend.

Identifying a consistent trend involves recognizing whether the values are either increasing or decreasing in a systematic manner. In this instance, the values are ascending, which aligns with the criteria for a trend. Such trends are important in various applications, including monitoring the performance of refrigeration systems, as they can indicate changes in conditions or the effectiveness of processes.

The other sets of figures do not maintain this consistent upward progression. For instance, while some may try to suggest fluctuations or patterns, they do not exhibit the same level of consistency in terms of being strictly greater than their predecessors. Thus, examining the values clearly shows why the third set is the only one with a solid, upward trend in density.