Hi

Using the standard slope-intercept form for an equation of a line y = mx + b

  where m is the slope and b the y-intercept.  

x-intercept=4, m=2

  y = 2x + b   |Pt(4,0) on the line: use ordered pair to solve for b

  0 = 8 + b

 -8 = b

  y = 2x - 8



 

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