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Question
Find the equation of the line passing through (−5, 7) and parallel to y-axis
Solution
The slope of the line parallel to y-axis is not defined.
That is slope of the line is tan 90° and hence the given line is parallel to y-axis.
(x1, y1) = (−5, 7)
Required equation of the line is
x − x1 = 0
`=>` x + 5 = 0
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