Given,
The equation of the graph is,
By replacing x by -x, if the equation remain the same then it is symmetric about the x axis.
Hence, the equation is symmetric about x axis.
By replacing y by -y, if the equation remain the same then it is symmetric about the y axis.
Hence, the equation is symmetric about y axis.
The equation is symmetric about the origin.
Hence, The equation is symmetric about x- axis, y-axis and origin.