If the correlation coefficient between Y and X in an ordinary least squares regression = 1.00, then

		all the data points must fall exactly on a straight line with a slope that equals 1.00.
		all the data points must fall exactly on a horizontal straight line with a zero slope.
		all the data points must fall exactly on a straight line with a negative slope.
		all the data points must fall exactly on a straight line with a positive slope.