The correlation coefficient represents the strength of a relationship of two sets of data relative to how linear they are. A correlation coefficient of r = 1 would indicate that the relationship was perfectly linear, a correlation coefficient of 0 would mean that they have absolutely no relationship linearly, and are completely dispersed. Hope that makes sense! :) :D
There are four side to 2 pennies both (2) coming up head out all the side (4) there is a 2/4 chance then simplify by dividing by 2/2 and get ½ so you have ½ chance of both becoming heads
