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put this solution on YOUR website! The x intercept is the x value when y = 0.  3x * 5(0) = 15.  3x=15.  x=5.  (5,0) is the point.
The y intercept is the y value when x = 0.  3(0) +5y = 15.  5y = 15.  y =3.  (0,3) is the point.
The graph is a line that passes through both points.