Find the equation of the line which intersects the x-axis at a distance of 3 units to the left of origin with slope –2.

Question:

Find the equation of the line which intersects the x-axis at a distance of 3 units to the left of origin with slope –2.

Solution:

It is known that if a line with slope makes x-intercept d, then the equation of the line is given as

m(x – d)

For the line intersecting the x-axis at a distance of 3 units to the left of the origin, d = –3.

The slope of the line is given as m = –2

Thus, the required equation of the given line is

y = –2 [x – (–3)]

y = –2x – 6

i.e., 2x + y + 6 = 0

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