1.[tex]y - y_1 = m(x - x_1)[/tex]
[tex]y - 4 = 3(x - 3)[/tex]
[tex]y - 4 = 3(x) - 3(3)[/tex]
[tex]y - 4 = 3x - 9[/tex]
[tex]y = 3x - 5[/tex]
2.[tex]y - y_1 = m(x - x_1)[/tex]
[tex]y - 2 = \frac{1}{2}(x - 1)[/tex]
[tex]y - 2 = \frac{1}{2}(x) - \frac{1}{2}(1)[/tex]
[tex]y - 2 = \frac{1}{2}x - \frac{1}{2}[/tex]
[tex]y = \frac{1}{2}x + 1\frac{1}{2}[/tex]