As part of an earth science project, erin tracked the amount of rain fall for 4 weeks. she started tracking after finding some initial data on the year's rainfall to date: week rainfall 1 5.5 2 8 3 10.5 4 13 if the linear function representing the amount of rainfall each week is f(w) = 2.5w + 3, what does the 3 represent in this function? the amount of rainfall in week 0 . the week that erin collected data. the amount of total rainfall. the amount the rainfall increased each week