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Drainage System Gradient Verification
Based on the scenario, identify the standard mathematical formula used to determine the slope () and provide the expression showing the raw substitution of the coordinates for Point A and Point B into that formula.
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Drainage System Gradient Verification
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A logistics coordinator is calculating the rate of change for a delivery route between two hubs located at coordinates (-2, -3) and (-7, 4) on a regional map. While applying the slope formula, the coordinator's substitution results in the expression 4 - (-3) in the numerator. Which fundamental mathematical rule must be recalled to correctly simplify this expression?