The graph above shows the two lines:

1. $6x - y - 11 = 0$ (in blue), which has a slope of 6.
2. $7x - y - 1 = 0$ (in red), which has a slope of 7.

The lines intersect at an angle of approximately $1.33^\circ$.

Would you like further details on the solution? Here are some related questions:

1. How do slopes affect the angle between two lines?
2. What happens if two lines have the same slope?
3. How is the tangent function used in calculating angles?
4. What is the significance of negative slopes in angle calculations?
5. How would parallel and perpendicular lines affect the angle formula?

Tip: In geometry, the smaller the difference in slopes, the smaller the angle between two lines.