The graph shown below illustrates the relationship between density and earthquake wave speed in different types of rock.
As the density of rock increases, the earthquake wave speed also tends to increase. This relationship is illustrated by the general trend of the points on the graph, which show an overall positive correlation between density and wave speed.
The data points for each type of rock—igneous, sedimentary, and metamorphic—cluster together, indicating that rocks of the same type tend to have similar densities and wave speeds. However, there is some variability within each type, as seen by the spread of the data points on the graph.
Overall, this graph demonstrates that density is a significant factor in determining the speed at which earthquake waves travel through rock. Rocks with higher densities tend to have faster wave speeds, while rocks with lower densities have slower wave speeds.