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12 questions from this quiz
How steep a line is
Line goes up from left to right
Line goes down from left to right
RiseRun\frac{\text{Rise}}{\text{Run}}RunRise
Vertical change
Horizontal change
111
y2−y1x2−x1\frac{y_2 - y_1}{x_2 - x_1}x2−x1y2−y1
222
Line is horizontal
Line is vertical
To avoid errors with negative numbers
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