Please answer q13 with explanation, Thank You So Much, will make sure to leave a great review.

13. A food science student is studying the relationship between the caloric content of a meal and the attentiveness levels of a person 30 minutes after consuming that meal. From a sample of test subjects, he finds that r = 0.28 and proceeds to construct a simple linear regression model for the bivariate data. He then proposes the use of his regression equation y = bo + bix to predict how attentive someone will be after consuming a meal of x calories. What crucial flaw is present in this statistical design and what would be an alternative way to predict values of y? (5 points)