Answer: (7/25, 26/25).
- A (7/25, 26/25)
- B (1/5, 2/5)
- C (−7/25, 26/25)
- D (7/25, −26/25)
Correct answer: A. (7/25, 26/25)
Explanation: 3(1)+4(2)−5 = 6 and 3²+4² = 25. Foot = (1 − 3·6/25, 2 − 4·6/25) = (7/25, 26/25).
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.