# Thread: linear equation word problem

1. ## linear equation word problem

The cost per week, C in dollars of producing n DVD's is given by the equation C = 9n + 800.

a) Find the slope of the line represented by this equation.

b) How much would the cost increase if additional DVD's were produced?

If somebody could help me out, that'd be great. I know how to find slope and everything, but not sure how to solve that equation.
Thanks.

2. Originally Posted by nfgcharlottegrl08
The cost per week, C in dollars of producing n DVD's is given by the equation C = 9n + 800.

a) Find the slope of the line represented by this equation.

b) How much would the cost increase if additional DVD's were produced?

If somebody could help me out, that'd be great. I know how to find slope and everything, but not sure how to solve that equation.
Thanks.
??? Do you understand that this problem doesn't ask you to solve the equation? You say you know how to find the slope (a). Fine. Now the cost increase for, say, one more DVD would be that slope. The cost increase for two more DVDs would be that slope times 2, etc.