{3x +y =1 {x+y= -3
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It is not possible to give a sensible answer because the operator between y1 and 9x is not visible.
Point-Slope formula: y - y1=m(x - x1) y = 2/3x + 1
3x * (x - 4) = 3x*x - 3x*4 = 3x^2 - 12x.
(y-y1)=m(x-x1) OR we can write it y=m(x-x1)+y1
y - y1 = m(x - x1), where m is the slope of the line, and (x1, y1) is a point on the line.