2
Probably you can recognize it as the equation of a circle with radius r = 1 and center at the origin, (0,0) The general equation of the circle of radius r and center at (h,k) is (x −h)2 (y −k)2 = r2 Answer link By using Pythagoras you would end up with the equation given where the 4 is in fact r^2 To obtain the plot points manipulate the equation as below Given" "x^2y^2=r^2" ">" "x^2y^2 =4 Subtract x^2 from both sides giving " "y^2=4x^2 Take the square root of both sides " "y=sqrt(4x^2) Now write it as " "y=sqrt(4x^2) '~~~~~ Calculate and
