Answer: (0, 0).
- A (2, 3)
- B (0, 0)
- C (4/3, 2)
- D (2, 0)
Correct answer: B. (0, 0)
Explanation: The right angle is at the origin, so the orthocentre is the vertex (0, 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.