Given: slope = - 1 and p = 5
Assuming: c be the intercept on the y - axis.
Then, the equation of the line is
y = - x + c [∴ m = - 1]
⇒ x + y = c
Dividing both sides by
This is the normal form of the given line.
Therefore, denotes the length of the perpendicular from the origin.
But, the length of the perpendicular is 5 units.
⇒ c =
Thus, substituting c = in y = - x + c , we get the equation of line to or
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