SOLUTION: An internet start-up predicts its revenue by a straight-line method with a slope of $3000 per month. In its 7 th month it had revenues of $22000. Find an equation for the revenue R

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: An internet start-up predicts its revenue by a straight-line method with a slope of $3000 per month. In its 7 th month it had revenues of $22000. Find an equation for the revenue R      Log On


   

Question 1067248: An internet start-up predicts its revenue by a straight-line method with a slope of $3000 per month. In its 7 th month it had revenues of $22000. Find an equation for the revenue R as a function of the number of months T.
Found 2 solutions by Boreal, MathTherapy:
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
slope is $3000 (my mistake) per month
For month 7, there was revenue of $22,000.
I am assuming that is after 7 months; the language is a little ambiguous.
Therefore, (7,22000) is a point
y-y1=m(x-x1) where m is slope and (x1,y1) point.
y-22000=3000(x-7)
y-22000=3000x-21000
R=3000T+1000,
graph%28300%2C300%2C-10%2C10%2C-1000%2C25000%2C3000x%2B1000%29

Answer by MathTherapy(10557) About Me  (Show Source):
You can put this solution on YOUR website!

An internet start-up predicts its revenue by a straight-line method with a slope of $3000 per month. In its 7 th month it had revenues of $22000. Find an equation for the revenue R as a function of the number of months T. 
Using t for T, the CORRECT equation you're looking for is: