Show graphically that the system of equations `3x-y=2` `9x-3y=6` has infinitely many solutions.

Explanation

(a) For equation 3 x-y=2

implies y=3 x-2

x -1 0 2

y-5-24

and for equation 9 x-3 y=6

implies 3 y=9 x-6

`y=frac{9 x-6}{3}`

implies y=3 x-2

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