\[ k = \frac{y_2 - y_1}{x_2 - x_1} = \frac{6 - 2}{2 - 0} = \frac{4}{2} = 2 \]
\[ f(7) = 2 \cdot 7 + 2 = 14 + 2 = 16 \]
Ответ: 16