Giselle graphs the function f(x) = x2. robin graphs the function g(x) = –x2. how does robin’s graph relate to giselle’s?

robin’s graph is a reflection of giselle’s graph over the x-axis.
robin’s graph is a reflection of giselle’s graph over the y-axis.
robin’s graph is a translation of giselle’s graph 1 unit down.
robin’s graph is a translation of giselle’s graph 1 unit left.