The following information regarding a dependent variable (y) and an independent variable (x) is provided. 
SSE = 1.9
SST = 6.8
The coefficient of correlation is
Definitions:
Long-Run Average Cost Curve
Shows the way per unit costs change with output in the long run.
Scale of Plant
The size or capacity of a single production facility or plant, which can affect its operational efficiency and production costs.
Total Revenue
The cumulative amount of income generated from the sale of goods and services, calculated by multiplying the price per unit by the number of units sold.
Total Variable Cost
The sum of all costs that vary with output level, including costs such as labor and materials.
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