Question
The estimated sales (tons) per month in four different cities by five different managers are given below:
ManagerCities
PQRS
I34363335
II33353133
III37393535
IV36363434
V35363533
Find out the assignment of managers to cities in order to maximize sales.

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Then the rate of increase of $x$ is $\frac{ d x}{ dt }$ which is proportional to $x$.
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In the figure, ABCD represents
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D (0, 10) 4(0) + 5(10) 50  
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$