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Find the equations of the straight lines a, b, c please

Find the equations of the straight lines a, b, c please-example-1

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See, pls, the suggested decision:
1) the lines seem to be parallel, a||b||c. Using this property,
2) two points are clear for line 'a': (0;0) and (6;1). Equation is
y= (1)/(6) x;
3) for lines 'b' it is additional +4 points in vertical direction (upon line 'a'):
y= (1)/(6)x+4
4) line item 3 for line 'c' is additional (-4) points in vertical direction (below line 'a'):
y= (1)/(6) x-4
User Irkinosor
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