A line has a slope of 2 and passes through the point (1, 3). An equation of the line is

  A) y = x + 2  
  B) y = x + 1  
  C) y = 2x + 1  
  D) y = 3x - 2
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1 Answer

A slope of 2 means we must have y=2x+... because the coefficient of x divided by the coefficient of y must be 2. Answer C has such a coefficient, and it passes through the point (1,3).

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