Q: Is slope calculated by finding the ratio of the "vertical change" to the "horizontal change" between two distinct points on a line? ¶
A: Yes.
Q: Are slopes -1? ¶
A: Yes, So these two lines are perpendicular.
Q: Is slope central to differential calculus? ¶
A: Yes.
Q: Are slopes equal or they both are vertical and therefore both have undefined slopes? ¶
A: Yes.
Q: Is slope negative? ¶
A: Yes, and the direction of the line is decreasing.
Q: Is slope zero? ¶
A: Yes.
Q: Is slope positive? ¶
A: Yes, and the direction of the line is increasing.