Answer:
If the first quantity doubles, the second is divided by two. If the first quantity triples, the second is divided by 3.
Step-by-step explanation:
It’s the second sentence in the online content site they gave.
Answer: Tammy's sample may not be vaild because she surveyed the students only from her class and it is likely that other classes might not like the subject maths. She might get the accurate results by surveying a larger number of people in the school instead of just her class.
