Hi,

It's not the difference between the y & x-values we need to explore...

1st***We need to use the points and determine the behavior of the 

'change' that occurs moving from one to another.  

(change in y) / (change in x ) determines the slope of this Line

 x= -5, -4, -3, -2 and y= 2, 0, -2, -4

Points:

(-5,2)

(-4,0) 

(-3,-2) m = 2/-1 = -2

(-2,-4) m = 2/-1 = 2



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 = -2x+ b   || Using (x,y) ordered pair (-4,0) to solve for b



    8 = b

 y = -2x+ 8 

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