Answer: −2.
- A 2
- B −2
- C 1
- D −1
Correct answer: B. −2
Explanation: The lines meet at (1, 1). Then 3 + k = 1, so k = −2.
The slope of a line is the ratio of vertical change (rise) to horizontal change (run) between any two points on it - equivalently, the tangent of the angle θ the line makes with the positive x-axis.