Posted by Esther on .
The value v of a shopkeeper's inventory software program is given by v=1/3t+3, where t is the number of years since the shopkeeper brought the program. What is the program worth 9 years after it is first purchased? Plot the point with the given t value 9
Thank you so very much. I have to admit that without your help, I'd have a slim chance of making it through school. Thank you, again!

Algebra 1 
drwls,
Make yourself a v vs x graph. Let v be the vertical (y) location, and t be the horizontal (x) location.
I will assume that your function is
v = t/3 + 3, and not
1/(3t) + 3 nor 1/(3t+3)
You need to be more careful showing parentheses where they are needed.
Plot these two points on the graph:
(0,3) and (9,0)
Draw a straight line connecting the two points.
The program is worth 0 after nine years. Stop the line on the graph at that point. It never has negative value.