1. A baker supposed that the age of a cake mix and the height of the cake made from it were related. She kept track of the age in years, x, and the height in cm, y, as an ordered pair (x,y). The results she recorded were (1, 5), (2, 5), (4, 8), (2, 6), and (1, 6). What is the correlation coefficient if age is the explanatory variable? Show all formulas used and all work