This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Conic xxyyx.svg en Graph of the conic xyy xyy xyy xy from matplotlib pyplot import from numpy import from mpltoolkits axesgrid axislines import SubplotZero linspace linspace meshgrid fig figure figsize ax SubplotZero fig fig addsubplot ax for direction in xzero yzero ax axisdirection setvisible True ax axisdirection setaxislinestyle