#HELP!! A company builds computers. It costs $6,700 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) = 550x −1200

C(x) = 550x + 1200

C(x) = 1200x − 550

C(x) = 1200x + 550

Question

#HELP!!  A company builds computers. It costs $6,700 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) = 550x −1200 

 C(x) = 550x + 1200 

 C(x) = 1200x − 550 

 C(x) = 1200x + 550

valpey · Answer

This is a fixed/variable cost problem. There is some fixed cost to running the place and some variable cost for each computer built so it should look like C(x) = x*VC + FC

valpey · Answer

$6,700 = 10*VC + FC
$12,200 = 20*VC + FC

anonymous · Answer

UHH

valpey · Answer

Subtract the first equation from the second equation.