Given a function defined to be:

with the slope (m) as a and the y-intercept as (0,b)
The graph of the linear function satisfies the following:
1. The range of the function is a set of all real numbers
2. The graph has an intercept at (0, b)
3. The graph is increasing if m > 0, decreasing if m < 0, and constant if m =0.
4. The domain of the function is the set of all real numbers.
Hence, the correct option is all of these
Answer:
Option B