Hope an expert can. with this. thanx

Taking care of units first:

4000cm = 40m

700cm = 7m

Let's find the area then:

A1 = Area of Small Rectangle =

A2 = Area of Large Rectangle =

A3 = Area of Semi-Circle =

Then, to find the perimeter:

In summary:

answer: 33 ( approx)

step-by-step explanation:

since, in the linear regression formula, the slope is the a in the equation y = b + ax ( by comparing it with the general equation of line y = mx + c )

where,

here given table is,

price ($), x   :           18         23       25       29       30       33

pairs sold, y :         16         13         10       8         6       2

so, ,   ,   ,

and   ,

thus, slop of the given line is,

⇒  

⇒   ≈ 33