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Option 2 : They represent coincident lines
Given,
ax + by = c
dx + ey = f
Concept:/Formula:
If the given equations of straight line are a1x + b1y + c = 0 and a2x + b2y + c = 0, then
If a2b1 – a1b1 = 0 or a1/a2 = b1/b2, then lines are parallel
If, a1/a2 = b1/b2 = c1/c2, then lines are coincident.
Calculation:
ax + by = c
dx + ey = f
a/d = b/c = e/f
If both lines same now we can say both lines are coincident.
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