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curve fitting is a very difficult and time wasting method while regrresion is more to use as compare to curve fitting
Slope = (vertical change)/(horizontal change), commonly referred to as rise/run. If the graph is a straight line, then you can count squares or measure how much change in vertical, over a specified change in horizontal. If it is a curve, then you need to have a tangent line (a line that touches the curve at a specific point and has the same slope as the line), then you can determine the slope of that line using the method described, above.
Assumptions to determine the PPC is:only 2 goods will be illustratedthe amount of resources is fixedstate of technology is constant
Mean and Standard Deviation
Mass-Curve is a plot of the cumulative flow volumes as function of time. It is used to determine the critical period of a reservoir showing the relationship between withdraw and addition to the reservoir.