RegionPlot

RegionPlot[pred,{x,xmin,xmax},{y,ymin,ymax}] makes a plot showing the region in which pred is True. 

RegionPlot[{pred1,pred2,…},…] plots several regions corresponding to the predi.

RegionPlot[{…,w[predi,…],…},…] plots predi with features defined by the symbolic wrapper w.

Please visit the official Wolfram Language Reference for more details and examples on core symbols.