You can
put this solution on YOUR website!
(graph 300x200 pixels, x from -6 to 5, y from -10 to 10, function 3X-6).

(graph 300x200 pixels, x from -6 to 5, y from -5 to 5, function X-1).

(graph 300x200 pixels, x from -6 to 5, y from -5 to 5, function Y-3).
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