Answer: y = 0.
- A x = 0
- B y = 0
- C x = 1
- D y = 1
Correct answer: B. y = 0
Explanation: The x-axis is where y = 0 (all points have y-coordinate zero).
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.