Hey there!
B in a slope intercept form equation is the the y intercept. It dictates where the line will cross the y axis, and therefore the line's placement altogether. This is because if there was no y intercept, the line would only be shaped by the slope, and would start at 0.
Hope this helped!
Answer: All of them are division signs. except for 1, (x - 12) <division sign> plus z
Total number of possible outcomes = 36