Plot

Plot[f,{x,xmin,xmax}] generates a plot of f as a function of x from xmin to xmax. 

Plot[{f1,f2,…},{x,xmin,xmax}] plots several functions fi. 

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

Plot[…,{x}∈reg] takes the variable x to be in the geometric region reg.

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