Answer: 40
Reason: Okay, so we can see that the line is travelling in a straight line. When we look closely at the graph, we can see that for every two minutes, it makes 80 bottles, and so on and so fourth. We know it makes 80 bottles in two minutes, so let's divide it by two to find out how many bottles it makes in one minute. (Equation for this = 2x = 80) After dividing, we find out that the machine makes 40 bottles per minute
Check: 40 bottles, and multiply it by 2, and we get 80 bottles per two minutes, and that's correct.
I hope this helps, and Happy Holidays!