The same as you would graph x=y. If you take the square root of both sides you get x=y
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You also need to add the graph of x=-y, since x2=y2 is the same as x=+/-y. For example, (-1,1) is a solution to this equation since (-1)2=1=(1)2.
You can see that x is not a function of y (and y is not a function of X) because for each value of x that satisfies the equation, there are two values of y possible. For example, (-1,1) and (-1, -1) both satisfy the equation.
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You are describing a circle, with its center at the origin and a radius of 4 (the square root of 16)
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.
Select a set of value of x in the range over which you wish to draw the graph. For each point, x, calculate x2+1 and then plot the point (x, x2+1) on a coordinate plane. Join these points with a smooth curve.