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

Question

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