Which relationship is stronger, r = +0.62 or r = 0.62?

Which relationship is stronger, r = +0.62 or r = 0.62?
 
  a. An r = +0.62 represents a stronger relationship than r = 0.62.
  b. An r = 0.62 represents a stronger relationship than r = +0.62.
  c. There is no difference in the strength of the two relationships.
  d. Without seeing a scatterplot of the data, there is no way to determine which is stronger.

Question 2

The strength of a relationship is indicated by the extent to which _____ paired with one and only one individual value of the _____ variable.
 
  a. many values of the Y variable are; X c. the entire range of the Y variable is; X
  b. many values of the X variable are; Y d. one value of the Y variable is; X

Question 3

The bigger they are, the harder they fall describes
 
  a. a positive linear correlation. c. no correlation.
  b. a negative linear correlation. d. a nonlinear correlation.