How do you write the equation of the horizontal line passing through (-8,9)?

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Answer 1 · 2016-07-24T18:00:09

#y = 9#

The equation of any horizontal line is #"y = .. a number"#

The x-value has no effect on the equation or on the line at all, as long as y-value stays the same.

In this case the line passes though the point #(-8,9)# which tells us that the y-value we want is 9.

Therefore the equation is #y = 9#