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I'm trying to make this plot symetrical by y-axis (even). But not sure what to do.

{(0.79 Sqrt[-1 + y^2])/(1/4 - y), (Sqrt[15/2] Sqrt[1 + y^2])/(4 (1/4 - y))}
ParametricPlot[%, {y, -2, 2}, PlotRange -> {{-2, 2}, {-2, 2}},AxesLabel -> {x, y}]

enter image description here

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If all you want to do is to create a plot that looks like the original but flipped around the $x$-axis, you can add a second function with the $x$-coordinate flipped:

original = {(0.79 Sqrt[-1 + y^2])/(1/4 - y), (Sqrt[15/2] Sqrt[1 + y^2])/(4 (1/4 - y))}
flipped = {-(0.79 Sqrt[-1 + y^2])/(1/4 - y), (Sqrt[15/2] Sqrt[1 + y^2])/(4 (1/4 - y))}
ParametricPlot[{original, flipped}, {y, -2, 2}, PlotRange -> {{-2, 2}, {-2, 2}}, AxesLabel -> {x, y}]

enter image description here

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  • $\begingroup$ I thought I tried this, there must have been some problem with the code. Thank you very much! $\endgroup$
    – Nitaa a
    Feb 16, 2022 at 20:57

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