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If x = -7, then x3 = -343 so that 2x3 = -686 y = 2 then 15 y = 30 So 2x3 + 15y = -686 + 30 = -656
Either the answer is the point in the second quadrant, at a distance of one unit from each of the coordinate axes, or the question is incomplete.
y=0 is a horizontal line on the x-axis. Therefore, it does not lie in any quadrant.
y=6x is in the third quadrant while x is negative and in the first quadrant while x is positive.
Slope for the equation y equals 7 is zero.