First part
We need to find the linear regression line of the given table.
The linear regression line is given by

The Pearson correlation coefficient is -0.7107. This is a moderate negative correlation, which means there is a tendency for high X variable scores to go with low Y variable scores (and vice versa).
Second part.
Now, If the value of the independent variable is increased by one unit, we have that

by substituting this into the linear regression, we get

and we have

then, the change in the dependent variable y is
