\usemodule[gnuplot]

\startGNUPLOTscript[lua]
   plot \ctxlua{context(1.2 * x + 3)}
\stopGNUPLOTscript

\startGNUPLOTscript[nolua]
   plot 1.2 * x + 3
\stopGNUPLOTscript

\starttext
\useGNUPLOTgraphic[lua]

Above should be a plot.

\useGNUPLOTgraphic[nolua]

\blank
\CONTEXT\ \contextmark\ \contextversion
\stoptext
