A regression study was done for 20 cities with latitude and average May temperature as the explanatory variable and response variable respectively. The latitude is ranged Born 26 to 4'? degrees and the average May temperature is measured in degrees Fahrenheit. Given that the regression equation is y = 49.4 0.31315. (i) Find the proportion of variation that explained by the average May temperature if the total sum of squares and the error sum of squares are 4436.6 and 1185.3 respectively. (2 marks) (ii) By using suitable coefcient(s), comment on the strength of the relationship between the latitude and the average May temperature