Answer: 6.
- A 4
- B 5
- C 6
- D 7
Correct answer: C. 6
Explanation: d = |3×3 - 4×(-4) + 5| / sqrt(9+16) = |9+16+5|/5 = 30/5 = 6.
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.