Hi

I. Using the point-slope formula, 

(0, -7) and 

(-1 ,0)  m = -7/1



II. 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. 

  y = -7x + b   |using ordered pair(-1,0) to find b

  0 = -7*-1 + b

  -7 = b

 y = -7x - 7  

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