Question 397206
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Hi
referring to 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= 5/8x –2 has a slope m = (5/8). A line &#8869; to it would have a slope m = -8/5
as &#8869; lines have slopes that are 'negative reciprocals' of one another