The graph shows $y_1=x^3$ passing (0,0) and a vertical or horizontal translation $y_2$ passing (-2,0). The blue line is solid while the red line is dotted. Write an equation for $y_2$ as shown in the graph.

Please directly answer the question and provide the final value, e.g., 1, 2.5, 300.
Question: The graph shows $y_1=x^3$ passing (0,0) and a vertical or horizontal translation $y_2$ passing (-2,0). The blue line is solid while the red line is dotted. Write an equation for $y_2$ as shown in the graph.

Please first conduct reasoning, and then answer the question and provide the final value, e.g., 1, 2.5, 300, at the end.
Question: The graph shows $y_1=x^3$ passing (0,0) and a vertical or horizontal translation $y_2$ passing (-2,0). The blue line is solid while the red line is dotted. Write an equation for $y_2$ as shown in the graph.
