An economics lecturer wants to study the relationship between income (in $1000s) and education (in years). A random sample of ten individuals in their thirties is taken and the results given below.

Education, x	16	13	15	10	13	10	19	16	13	15
Income, y	73	45	65	40	48	41	95	72	62	59

From a preliminary analysis of the above sample data, it was found that:

mean x = 14 mean y = 60

SSX = 70 SSY = 2698 SSXY = 410

Calculate three decimal places, the coefficient of determination, r² =