The slope would be 0. Because the line would be flat if all of the y values equal 3, that means the slope = 0. If now x=9 or anything like that, that would be undefined,
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The slopes of perpendicular lines are opposite and reciprocals.
C
you have the 2 side ones and the top one, you are missing the bottom vertice
The answer is 6x^2+4xy^2 multiply the 2xy to each term