A computer manufacturer built a new facility for assembling computers. There were construction and new equipment costs. The company paid for these costs and made combined profits of $10 million after 4 years, as shown in the graph:

Which equation most closely represents the line depicted in the graph?
A.) f(x) = -10x + 4
B.) f(x) = 15/2x - 20
C.) f(x) = 10x - 4
D.) f(x) = 2/15x - 20