3x+y=1 is the equation of a line with slope -3 and y intercpet 1.
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3x+y = 4 y = -3x+4 Perpendicular slope: 1/3
y = 3x + 1 is a linear equation - it is the equation for a graph of a straight line that crosses the y axis at 1 and the x axis at -1/3, and has a gradient (slope) of 3.
one is y=3x+3 so is y=3x+5
y-3x+6y=12 7y=3x+12 y=3x/7 +12/7
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