1). In order to graph slope, you need to do rise
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run
2). First, plot your y intercept on the y axis. In your case, the y intercept is 2.
3). From that point, move up 3 units and to the right 4 units to graph your slope. If the slope was negative, you would move up three units and to the left 4 units.
I hope this helps you to understand the process of graphing lines in slope intercept form better!