Question 57255
Solving for y yields {{{y=-expr(1/3)x+2}}}.  Because any two points define a straight line, you need to pick two values of x to solve for y -- that will give you two ordered pairs to plot and connect.  Choosing x=0 gives y=2, and if x=3, then y=1.  There are your two pairs, so just plot them and draw a line between them.  The graph is:
{{{graph(200,200,-2,10,-5,5,-x/3+2)}}}