For items 12 to 15: Identify the graph of each linear equation. Refer from the choices provided below.

For items 12 to 15: Identify the graph of each linear equation. Refer from the choices provided below.

у у 2 2 21 X -2 0 B 2 -2 0 2 0 -2 -2 B с D А 12. x + y = 1 13. x = 2 14. y = 2 15. y = x - 1​