Question

Find the distance from the point (-2,4) from line x=0?

Answer 1

The equation of the line is given by the x-intercept of the line.

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In this case x=0 goes though the origin (x=0), which means this is the equation of the y-axis.

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so distance between (-2,4) and the y -axis = only y coordinate of the given point (4).

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i.e. 4 is the distance between from the given point and y-axis.