 with or without the zero point in the Y axis." width="768" height="50%" />
<p class="caption">
Figure 4.8: Body temperature over time, plotted with or without the zero point in the Y axis.
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<p>Edward Tufte introduced the concept of the <em>lie factor</em> to describe the degree to which physical differences in a visualization correspond to the magnitude of the differences in the data. If a graphic has a lie factor near 1, then it is appropriately representing the data, whereas lie factors far fr