Hi,

0.4y=2x-3.2  0r  4y = 20x - 32  0r  y = 5x - 8

Using the point-slope form:  (y-(-8)) = 5x   0r  (y+8) = 5x

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 = 5x -8

standard form of a line is in the form Ax + By = C

 5x -y = 8 

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