SOLUTION: Examine the graph and consider trips more than 7,000 miles by a Boeing 777. Use a rate of change to estimate how the maximum payload decreases as the distance traveled increases.

Question 939207: Examine the graph and consider trips more than 7,000 miles by a Boeing 777. Use a rate of change to estimate how the maximum payload decreases as the distance traveled increases.
http://www.webassign.net/tgintroalgp4/3-4-078.gif
Answer by TimothyLamb(4379) (Show Source): You can put this solution on YOUR website!
slope = m
m = dy/dx
m = (120000-0)/(7000-15000)
m = -15
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y - 120000 = -15(x - 7000)
y = -15(x - 7000) + 120000
where:
x = distance traveled (must be between 7000 and 15000 miles)
y = maximum payload (pounds)
---
example 1:
x = 7000 miles
y = -15*(7000 - 7000) + 120000
y = 120000 pounds
---
example 2:
x = 11000 miles
y = -15*(11000 - 7000) + 120000
y = 60000 pounds
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