Answer
a = 6000 dollars
b = 8000 dollars
Work Step by Step
we know that C will be the price when "x" watches will be done manufacturing.
we know that the base cost will always be 4000 that is the constant in this equation.
in (a) we see that we want to find the cost of producing 1000 watches. We know "x" represents the amount of watches, so we plug in 1000 into x. This will be the same for (b) so we plug in 2000 into x
6000 = 4000 + 2(1000)
8000= 4000 + 2(2000)
