Which equation of the least squares regression line most closely matches the data set? Note: The variable x represents the years after 1970.Y= -5.7x-67Y= -0.98x+65Y= -0.17x+76Y= -5.7x +67

Judging by the first and last points (0, 65), (8, 21), the slope is about -44/8 = -5.5 and the y-intercept is about 65.

The 4th selection is appropriate.