Linear Functions  Exercise 2  Modeling
A website owner makes money via advertising on her site. The
owner finds that the approximate monthly net income is approximately
equal to $25 when 40 people visit the site daily and $225 when 200
people visit the site daily. Show that the linear function that
gives the monthly net income as a function of number of daily visitors
is y = 1.25x  25 where y represents monthly net income and x
represents daily number of visitors. Justify each step.
BONUS POINT  What does the "yintercept" represent in this
problem?
STATEMENT 
JUSTIFICATION 
The monthly net income
is approximately equal to $25 when 40 people visit the site daily
and $225 when 200 people visit the site daily.

Given

