If m and b are constants and, in the xy-plane, line l has equation y = mx + b, then what is the value of m ?

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If m and b are constants and, in the xy-plane, line l has equation y = mx + b, then what is the value of m ?

(1) Line l intersects the line y = x at (1,1).

(2) Line l is parallel to the line with equation y = (2m + 1)x + 1.


OA B

Source: Princeton Review