Answer: Additional day is associated with a production of 26 units
Steps:
130 units ---- 5 days
650units ---- 25 days
which shows this is a linear relationship (130 units x 5 = 650 units)
So we can divide the increase (650-130) = 520 by 20 days to get the increase per 1 day: 520 units /20 days = 26 units/day