In the figure below, what type of weathering is being shown? 
Definitions:
SPSS
Statistical Package for the Social Sciences; a software package used for interactive, or batched, statistical analysis.
Scatter Plot
A graphical representation using Cartesian coordinates to display values for typically two variables for a set of data.
Least-Squares Regression
A statistical method used to determine the line that best fits a set of data points by minimizing the sum of the squares of the differences between observed and predicted values.
SPSS
A software package used for interactive, or batched, statistical analysis.
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