Firstly you have to turn it into an equation: Y=3x+1 to find the coordinates
at y axis x=0
find the pair (0,1) on your graph
at x axis y =0
find the pair (-1/3,0) on your graph
join those 2 pairs with a dotted line (because it is less)
then you have to shade the part that this inequality represents. And since y is less than 3x+1 you shade the space ABOVE your dotted line .
Try this graphing calculator through this graphing calculator ti 84 you can easily do your graphing calculations.
hope this has helped!