How many edges does this graph have?

Use symmetry to sketch the graph of xy2=1.

a If a graph is symmetric with respect to the x-axis and (a,b) is on the graph, then (,) is also on the graph. b If a graph is symmetric with respect to the y-axis and (a,b) is on the graph, then (,) is also on the graph. c If a graph is symmetric about the origin and (a,b) is on the graph, then (,) is also on the graph.