[tex]58 = - 10a + b | \times ( - 1) \\ 22 = 2a + b \\ \\ - 58 = 10a - b \\ 22 = 2a + b \\ \\ - 58 + 22 = 10a + 2a \\ - 36 = 12a \\ a = - 3 \\ \\ 22 = 2 \times ( - 3) + b \\ b = 28 \\ \\ y = - 3x + 28[/tex]
[tex] - 95 = - 8a + b | \times ( - 1)\\ 25 = 4a + b \\ \\ 95 = 8a + - b \\ 25 = 4a + b \\ \\ 95 + 25 = 8a + 4a \\ \\ 120 = 12a \\ a = 10 \\ \\ 25 = 4 \times 10 + b \\ b = - 15 \\ \\ y = 10a + ( - 15)[/tex]
[tex]7 = - 10a + b | \times ( - 1) \\ - 3 = 5a + b \\ \\ - 7 = 10a - b \\ - 3 = 5a + b \\ \\ - 7 - 3 = 10a + 5a \\ - 10 = 15a \\ a = - \frac{2}{5} \\ \\ - 3 = 5 \times - \frac{2}{5} + b \\ \\ b = - 1 \\ \\ y = - \frac{2}{5} x + ( - 1)[/tex]
[tex]2 = - 6a + b | \times ( - 1)\\ 4 = 24a + b \\ \\ - 2 = 6a - b \\ 4 = 24a + b \\ \\ - 2 +4 = 6a + 24a \\ 2 = 30a \\ a = \frac{1}{15} \\ \\ 4 = 25 \times \frac{1}{15} + b \\ b = 2 \frac{1}{3} \\ \\ y = \frac{1}{15} x + 2 \frac{1}{3} [/tex]
