I meant, Y=3/2x+3
That is not an inequality, its a linear function.
Place a dot at (0,3), the y-intercept. The slope is 3/2 so go up 3 units and to the right 2 units. That point is (2,6). Draw a line that goes through those 2 dots. It should also go through (4,9) and (-2,0).
Generally if you don’t know what a function looks like, plot some points and draw a curve or line that goes through them.