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y equals x plus 4 when y equals 0 then x equals 2i i is the square root of negative 1
It is the equation of a parabola.
It is the Cartesian equation of an ellipse.
Y = x squared -4x plus 3 is an equation of a function. It is neither called a domain nor a range.
The center of the circle given by the equation (x - 3)2 plus (y + 2)2 = 9 is (3,-2).