Consider the following sets of data in terms of x and y. The coefficientcorrelation, r, is a measure of the type of relationship which exist between x and y given a straight line basis.

x	1	2	3	4	5	6
y	4	8	9	11	11	15

Calculate the following:

1. the coefficient of correlation and interpret
2. The coefficient of determination and interpret
3. The least squares regression line of y on x ( y = m x + c)
4. The gradient
5. They-intercept
6. Estimate the value of :
7. y when x = 8
8. x when y =20
9. Plot the scatter-diagram based on the data above.