Unformatted text preview: Scatter diagram . In a scatter diagram , all parts would be plotted on a graph with activity (gallons of water used, in the example graph later in this section) on the horizontal axis and cost on the vertical axis. A line is drawn through the points and an estimate made for total fixed costs at the point where the line intersects the vertical axis at zero units of activity. To compute the variable cost per unit, the slope of the line is determined by choosing two points and dividing the change in their cost by the change in the units of activity for the two points selected....
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- Spring '09
- Total fixed costs, local phone calls