Answer: 2.
- A 2
- B 4
- C -4
- D 0
Correct answer: A. 2
Explanation: Set y = 0: 0 = 2x - 4, x = 2. The line crosses the x-axis at (2,0).
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.