Question: Suppose that the closing price for the DJIA is 13,100. Estimate the closing price for the S&P 500.
	If required, round your answer to the nearest whole number. Do not round intermediate calculations.

The Dow Jones Industrial Average (DJIA) and the Standard & Poor's 500 (S&P 500) indexes are used as measures of overall movement in the stock market. The DJIA is based on the price movements of 30 large companies; the S&P 500 is an index composed of 500 stocks. Some say the S&P 500 is a better measure of stock market performance because it is broader based. The closing price for the DJIA and the S&P 500 for 15 weeks, beginning with January 6, 2012, follow (Barron's website, April 17, 2012).

Click on the datafile logo to reference the data.

Date	DJIA	S&P
January 6	12,360	1,278
January 13	12,422	1,289
January 20	12,720	1,315
January 27	12,660	1,316
February 3	12,862	1,345
February 10	12,801	1,343
February 17	12,950	1,362
February 24	12,983	1,366
March 2	12,978	1,370
March 9	12,922	1,371
March 16	13,233	1,404
March 23	13,081	1,397
March 30	13,212	1,408
April 5	13,060	1,398
April 16	12,850	1,370

I got that Y= -669.021 + 0.157X

And I need to plug in 13100 into the X.

I keep gettting 1,387.679 but for the whole around I put 1388 for an answer but it said it's wrong. What is the correct answer?