SOLUTION: I have looked thru about 1000 answers on here and can't figure out how to solve my problem. Finding the slope, I came up with .20. Am I right that this means there is a .20 increa

Question 321056: I have looked thru about 1000 answers on here and can't figure out how to solve my problem. Finding the slope, I came up with .20. Am I right that this means there is a .20 increase of profit per person? I feel like this should be so simple but I just can't quite come up with an equation that works. Please help!! Here is the problem: If the profit from 500 customers is $1000 and the profit from 900 customers is $3000, what will the profit be for 1500 customers?
Thanks so much!

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
If the profit from 500 customers is $1000 and the profit from 900 customers is $3000, what will the profit be for 1500 customers?
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Find a linear equation that relates profit and # of customers.
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slope = (3000-1000)/(900-500) = 2000/400 = 5
----
1000 = 5(500) + b
b = -1500
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Equation:
profit = 5(cust) - 1500
---
what will the profit be for 1500 customers?
profit = 5*1500-1500
profit = 4*1500 = $6000
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cheers,
Stan H.
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