How to find the marginal cost

Hi friend where is your question?

Marginal Cost=Change in Total Cost/Change in Total Quantity

Step-by-step explanation:

Marginal cost is calculated by dividing the change in total cost by the change in quantity. Let us say that Business A is producing 100 units at a cost of £100. The business then produces at additional 100 units at a cost of £90. So the marginal cost would be the change in total cost, which is £90. Divided by the change in quantity, which is the additional 100 units. That gives us: £90/100, which equals £0.90 per unit as the marginal cost.

y = 0.77(x)

step-by-step explanation:

the jacket retains this value after 23% cut or retains 77% of original value. plug original 87 jacket price for x and the remaining value should be y.

i believe it is c.y = 9x

rise over run. 9 units up over 1 unit right or 9/1