1)

[tex]y = 3x - 1 \\ [/tex]

[tex]x = 1 \\ y = 3 \times1 - 1 = 2[/tex]

[tex]x = - 3 \\ y = 3 \times ( - 3) - 1 = - 9 - 1 = - 10[/tex]

[tex]x = 2.5 \\ y = 3 \times 2.5 - 1 = 7.5 - 1 = 6.5[/tex]

2)

[tex]y = - 5x + 6 \\ y = 6 \\ - 5x + 6 = 6 \\ - 5x = 6 - 6 \\ - 5x = 0 \\ x = 0[/tex]