Which is a correct description of the data in the table? time worked (hours) 8 11 10 5 12 8 earnings ($) 72 99 90 45 108 72 a. the explanatory variable is time worked. the response variable is earnings. the association is positive. b. the explanatory variable is time worked. the response variable is earnings. the association is negative. c. the explanatory variable is earnings. the response variable is time worked. the association is positive. d. the explanatory variable is earnings. the response variable is time worked. the association is negative.