algebra
posted by anonymous on .
The value, v, of a shopkeepers inventory software program is given by v= 1/2t+5, where t is the number of years since the shopkeeper bought the program. What is the program worth four years after it is 1st purchased. Plot the point with the given tvalue, 4.
I have made calculations of
1/2t(0) + 5 = v 5 (0,5)
1/2t(4) + 5 = v 3 (4,3)
1/2t(2) + 5 = v 4 (2,4)
1/2t(8) + 5 = v 1 (8,1)
On the graph I cannot figure out how to plot t4. The only way the lines will go is from 0 on both sides.
Can someone help me with this without a graph to show me?
Thanks so much.

Go to:
rechneronline.de/functiongraphs
When page be open in blue rectangle type:
0.5*x+5
In Range xaxis type 6 to 14
In Range yaxis type 2 to 8
Then click option Draw