The scatter plot shows the trade-in values and private-party value of 10 cars.

The correct option is 4.

Step-by-step explanation:

The scatter plot shows the trade-in values and private-party value of 10 cars.

The equation for regression line is

             .... (1)

The slope intercept form of a line is

                    .... (2)

Where, m is slope and b is y-intercept.

From equation (1) and (2), we get

The rate of change is 1.07. It means each increase of $1 in trade-in value, the private party value increases by $1.07.

So,  the each increase of $1000 in trade-in value, the private party value increases by

Therefore the correct option is 4.