Suppose that the sample regression equation of a model is 
.If we examine the relationship between x1 and y for four different values of x2,we observe that the four equations produced differ only in the intercept term.
Definitions:
Boiling Water
The process of heating water until it reaches a temperature at which it bubbles and turns to vapor.
Steam
Water vapor generated by boiling water, used for heating, propulsion, and sterilization among other applications.
Leathery Tissue
This term may refer to tissue that has become tough and resilient, similar to leather, often due to exposure, aging, or certain conditions but is not a standard scientific term.
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