Plessy vs. Ferguson was the case that ruled that segregation laws were acceptable specifically the public facilities under the Separate but Equal doctrine. It was later overturned through court decisions and legislation.
Answer:
the range of variation
Explanation:
The range is the simplest measure of variation to find. It is simply the highest value minus the lowest value. Since the range only uses the largest and smallest values, it is greatly affected by extreme values, that is - it is not resistant to change
I'd say "d" considering all of the other options are very negative.
As a step in the relationship
