Mr. Kim's eighth grade science class was trying to maintain a classroom garden. Unfortunately, the weeds were taking over. Mr. Kim
saw a weed killer advertised on TV which said that one application would kill the three most common garden weeds and would be
effective for at least one month. Mr. Kim bought some and applied it to the classroom garden. His students kept track of the weeds
growing in their garden.
What could Mr. Kim's students infer from their data?