Slopes and Equations of Lines

Find the slope of the line passing through the given points, when possible. (If an answer is undefined, enter UNDEFINED.) (−9, 5) and (−15, 6)

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Finding the Slope of a Line from 2 Points

To find the slope by hand, follow the next steps: Insert the coordinates \$(x_A,y_A)\$ and \$(x_B,y_B)\$. Let us the formula to calculate the slope of the line passing through the points
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Finding the Slope of a Line Passing through Two Points

Find the slope m of the line passing through the given pair of points. (If an answer is undefined, enter UNDEFINED.) (23, 28) and (16, -14)