What figure is described below the locus of points in a plane 3 units from the line y=1

Which polynomial function has x intercepts -1, 0, and 2 and passes through the point (1, -6)

Ineed with number 6 , explain how to get 1978

Aclassmate thinks that solving a system by graphing gives an exact answer when the lines appear to cross at a grid point, but only an approximate answer when they don't. explain why this isn't true.