The following output is for a second-order polynomial regression model where the independent variables are x and x2 (x^2 in output).Some of the output has been omitted. 
Considering the above information,the model explains approximately 56.7 percent of the variation in the y variable.
Definitions:
Marginal Cost Curve
depicts how the cost of producing an additional unit of output changes as the level of production is varied, typically rising after a certain point due to inefficiencies.
Profit Maximizing
A strategy or behavior in businesses aimed at achieving the highest possible profit under given constraints.
Short-Run Equilibrium
The condition in which market supply equals market demand within a short time frame, establishing a temporary market price.
Marginal Cost Functions
Represents the change in total cost that arises when the quantity produced is incremented by one unit.
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