Question 1041440
cubes tend to be symmetric to the origin.  When it looks the same from upside down, it is symmetric about the origin.  This is.
If you change the y to negative and it is on the graph with the same x, it is symmetrical about x.  This isn't the case.
If you change the x to negative and it is on the graph with the same y, it is symmetrical about y.
If you negate both and they are on the graph, it is symmetrical about the origin.  That is the case here.
{{{graph(300,200,-10,10,-100,100,-6x^3-7x)}}}