00:01
Consider the given graph of the cost function c of q below.
00:04
Looking at this graph, we can see that our cost function is a linear function.
00:11
Now, to find the fixed cost, we first want to find the marginal cost or the slope of this cost function.
00:22
Now, marginal cost, this is equal to the difference of the cost at, two values of q, so let's say c of q sub 2 minus c of q sub 1 over the difference between the q's, so q sub 2 minus q sub 1.
00:44
So if that's a case, let's say we pick a point on this curve and the best points would have to be this point and this point.
00:59
So let's say this is our q1, c1, and then this will be our q2, c2.
01:14
So our marginal cost would be c of q2, which is 30, minus c of q1 is 10, all over 30 minus 10.
01:27
So c is 30, that's 240 minus c of 10, which is, in this case, it's 120, all over 20.
01:40
And this would give us a value equal to six...