Question

Find the equation of a line through (2,-4) and (-7,-4)

Answer 1

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Find slope : 
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$\text {Slope = } \dfrac{-4 - (-4)}{-7-2} = \dfrac{0}{-9} = 0$

When the slope is 0, the graph is a horizontal line.

Equation of the graph is y = -4

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Answer: y = -4
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