Solve the Problem $v$ , in Hundreds of Dollars, of Juan's Computer Is Approximated

Multiple Choice

Solve the problem.
-The value, $v$ , in hundreds of dollars, of Juan's computer is approximated by $v=-\frac{1}{2} t+8$ , where $t$ is the number of years since he first bought the computer. Graph the equation and use the graph to estimate the value of the computer 4 years after it was purchased.

A) $\$ 600$
B) $\$ 720$
C) $\$ 1000$
D) $\$ 400$