<object:standard:sc.912.n.1.1; ma.912.s.3.2=””>Bethany has a fish tank at her house. She uses the following data table to keep track of the nitrate and phosphate levels in the tank.
|January||8.0 mg/L||0.010 mg/L|
|February||8.1 mg/L||0.010 mg/L|
|March||7.9 mg/L||0.009 mg/L|
|April||9.2 mg/L||0.012 mg/L|
|May||9.7 mg/L||0.020 mg/L|
|June||9.9 mg/L||0.029 mg/L|
|July||10.6 mg/L||0.032 mg/L|
|August||10.8 mg/L||0.038 mg/L|
|September||11.0 mg/L||0.036 mg/L|
Bethany notices that the fish tank is gradually filling with algae. Based on the data she has collected, when did the problem most likely start? Explain.