Let 't' represent the missing coordinate, that is (4, t) lies on the line y = (2/7)x - 3.

We plug the values for x = 4 and y = t and solve the equation for t:

t = (2/7)*4 - 3

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t = - 13/7

t = - 1 6/7

The coordinates are (4, -1 6/7).

You can also see the solution from the graph of the line: y = (2/7)x - 3

Click here to see the graph