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 t-value, 4.

Question

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 t-value, 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.

Anonymous · Answer

Go to: rechneronline.de/function-graphs When page be open in blue rectangle type: -0.5*x+5 In Range x-axis type -6 to 14 In Range y-axis type -2 to 8 Then click option Draw