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| Math Central | Quandaries & Queries |
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Subject: Writing the Equation of a Vertical Line passing (Point1,Point2) How do I write an equation of a vertical line passing a coordinate of points? Such as: Write the equation of a vertical line passing through (6,-2) |
Hi Alex,
Think about the graph of the vertical line through (6, -2).
The x-coordinate of every point on the graph is 6. Furthermore if a point in the plane is not on the graph then its x-coordinate is not 6. Hence a point (x,y) in the plane is on the graph if and only is x = 6. Thus the equation of the vertical line through (6, -2) is
x = 6.
Penny
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