18 cards for “Straight-Line Graphs” in Coordinate Geometry — the deck as imported, SME deck order.
Complete the gradient formula for a line through (x1,y1)( x_{1} , y_{1} )(x1,y1) and (x2,y2)( x_{2} , y_{2} )(x2,y2):
m = \frac{\_\_\_\_\_\_}{\_\_\_\_\_\_}
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