calculus
posted by Reed .
find the arc length from (x1,y2) to (x2,y2) on the graph F(x)=mx+b

F(x) is a straight line, so arc length simply refers to the straight line distance between two points, P1(x1,y1) and P2(x2,y2) which is given by:
distance = √((x2x1)²+(y2y1)²)
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