A simple random sample of 100 men aged 25-34 averaged 70 inches in height, and had a standard deviation of 3 inches. Their incomes averaged $34,900 and had a standard deviation of $17,200. Fill in the blank: From the least-squares line, we would predict that the income of a man 70 inches tall would be ______.
i. less than $34,900.
ii. greater than $34,900.
iii. equal to $34,900.
iv. We cannot tell unless we know the correlation.