Does anyone know a piece of advice, how to draw graphs like
abs(y)=1-x^2?
thanks
just meas that or .
Therefore you can just draw the graph of , and then draw that graph again, but flipped around the x-axis (which changes the sign of the y-coordinates only).
Of course, the resulting figure is not the graph of a function, but it is the graph of a relation (between x and y).