Which table best classifies the following numbers as rational and irrational?

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Solve by any method (graphing, substitution or linear combination)y = x - 82x + 3y = 1a) (2, -6)b) (5, -3)c) (4, -4)d) (0, -8)i figured it out. the answer is (5, -3)

If f(x)=2x-6 and g(x)=3x+9, find (f-g)(x)