Question

Please help and explain to me how to solve this

Answer 1

Given:

There is a graph given in the question

Required:

We need to find the approximate cost of year 1987

Step-by-step explanation:

Here we can see in the graph that

There are two points as

`\begin{gathered} (x_1,y_1)=(1983,5093) \\ (x_2,y_2)=(1991,10027) \end{gathered}`

Now by using midpoint formula

`((x_1+x_2)/(2),(y_1+y_2)/(2))=((1983+1991)/(2),(5093+10027)/(2))=(1987,7560)`

Final answer:

The approximate cost of year 1987 is $7560