Identify the explanatory variable and the response variable. the number of miles a person runs per week for three months and that person's time in a 5-km race The explanatory variables represents ---Select- --Select-- the response variable is 1) a person's time in a 5-km race 2) the number of miles a person runs per week for three months or the first sentence 1) the person's time in a 5-km race 2) the number of miles the person runs per week for three months for the second centonce