to get the equation of any straight line, we simply need two points off of it, let's use those two points in the picture below.

keeping in mind that for the point-slope form, either point will do, in this case we used the second one, but the first one would have worked just the same.
Answer:
409
Step-by-step explanation:
18 x
--- = ---
22 500
18 x 500 = 9000
9000/22 = 409
i think 15 is the right answer
Answer:
6.4 Cajas
Step-by-step explanation:
320/50 = 6.4 Cajas
Answer: The waiting time will be 32 minutes when 240 people in line.
Step-by-step explanation:
Let us assume that the waiting time is directly proportional to the number of people in the queue.
Equation of direct proportion between variables x and y : 
Put
to find
.

Hence, the waiting time will be 32 minutes when 240 people in line.