Hi There!
Part A:
Slope = 6
Y intercept = 8
It is written in slope intercept form (y = mx + b)
m = slope and b = y intercept
Part B:
Rate of change - is how many berries are picked in a certain period of time.
Initial Amount - is either how much they start with or how much they end with.
Part C:
Use points (0, 8) and (6, 0) as reference points.
Hope This Helps :)