题目
Which valuation tool is recommended to be used if the goal is to make comparisons of three or more variables over time?
选项
A.Heat map
B.Bubble line chart
C.Scatter plot matrix
答案
B
解析
B is correct. A bubble line chart is a version of a line chart where data points are replaced with varying-sized bubbles to represent a third dimension of the data. A line chart is very effective at visualizing trends in three or more variables over time. A is incorrect because a heat map differentiates high values from low values and reflects the correlation between variables but does not help in making comparisons of variables over time. C is incorrect because a scatterplot matrix is a useful tool for organizing scatterplots between pairs of variables, making it easy to inspect all pairwise relationships in one combined visual. However, it does not help in making comparisons of these variables over time.B是正确的。气泡线图是折线图的一个版本，其中数据点被替换为不同大小的气泡，以表示数据的第三维。折线图在可视化三个或更多变量随时间变化的趋势方面非常有效。A是不正确的，热力图区分高值和低值，并反映变量之间的相关性，但无助于随时间变化的变量间比较。C是不正确的，散点图矩阵是组织变量对之间散点图的有用工具，可以方便地在一个组合视觉中检查所有成对关系。然而，随着时间的推移，这无助于对这些变量进行比较。