Answer: Collinear (on same line).
- A Vertices of a triangle
- B Collinear (on same line)
- C Form a right angle
- D Equidistant from origin
Correct answer: B. Collinear (on same line)
Explanation: Slope from (1,1) to (2,3) = 2; from (2,3) to (3,5) = 2. Equal slopes so collinear.
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.