A company builds computers. It costs $7,600 to build 10 computers and $12,200 to build 20 computers. Which equation models the cost, C(x), as a linear function of the number of computers built, x?

c(x)=
460x-3000

c(x)=
3000x-460

c(x)=
460x+3000

c(x)=
3000x+$460

Question

A company builds computers. It costs $7,600 to build 10 computers and $12,200 to build 20 computers. Which equation models the cost, C(x), as a linear function of the number of computers built, x? 

c(x)=
460x-3000

c(x)=
3000x-460

c(x)=
460x+3000

c(x)=
3000x+$460

anonymous · Answer

I know what the answer is, but I don't understand how to get to it.

saifoo.khan · Answer

Let's suppose 
(x,y)
(computer, cost)

Point 1:
(10, 7600)

Point 2:
(20,12200)

saifoo.khan · Answer

Now, you have two, can you find the equation of line?

anonymous · Answer

Got it, thanks!