All solutions here are SUGGESTED. Mr. Teng will hold no liability for any errors. Comments are entirely personal opinions.

(i)

(ii)
Using Graphing Calculator, $r = -0.926$.

Since $|r|$ is close to 1, there is a strong negative correlation between the number of hours spent travelling to and fro work and the number of hours spent watch television.

(iii)
Using Graphing Calculator, equation of regression line of $y \mathrm{~on~} x$ is $y = -0.9021x+16.15$

(iv)
When $x = 13.2, y = 4.24$ hours

The estimate is not reliable since $x =13.2$ is outside the range of sample data.