## The exercise:

The following table represents the annual production development in tons for a certain type of fish in one of the aquatic farms for fish farming.

**1)**Represent The scatter plot attached to the statistical series in a perpendicular coordinate system.

On the abscissa axis, 2 cm represents one year, and on the ordinate axis, 1 cm represents 100 tons of fish.

**2) ** Determine the coordinates of the middle point G of the scatter plot.

**3)** Prove that the least squares regression line equation is: y=115x+411.67.

**4)** Determine the production of this water reservoir in the year 2015.

(All results are given rounded to 10^{-2}).