Bill is building a ramp for his grandmother so her wheelchair can be easily pushed into her home. The vertical height of the ramp is three feet. He constructs the ramp to be 12 feet long. The ramp is sketched on a coordinate plane with the base of the ramp at the origin and the x-axis representing ground level.
If each unit on the graph represents1 foot on the ramp, what are the coordinates of the top of the ramp?
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