Explain the concept of positive, negative, and zero slope.

1. Use the distance formula to find the distance between the points; (2, 1) and (6, 6).
2. How do we find X- Intercept and Y-Intercept. Give an example.
3. How can we find the slope of a line. Give an example.
4. Explain the concept of positive, negative, and zero slope.
5. Define a function. Give an example.