The graph below illustrates the predicted number of meningitis cases with or without herd immunity after the initiation of the meningitis vaccination program in the United Kingdom in 1999.Write a short paragraph comparing the observed number of cases to the predicted number of cases.Assess the predictive value of the model used to generate the graph and how this relates to the prediction of the number of cases that would exist without herd immunity. 
Definitions:
Equivalent Ratio
A ratio that has the same value when compared to another ratio, despite possibly having different terms.
Ratio
A relationship between two quantities expressed as the quotient of one divided by the other.
Equivalent Ratio
A way to express the same relationship or proportion between two quantities, although the numbers involved may differ.
Equivalent Ratio
A proportional relationship between two quantities showing how many times one value contains or is contained within the other.
Q18: How many subjects participated in an independent-samples
Q26: Cells naturally,without using energy,respond to changes in
Q29: Using the data given below, perform a
Q29: Two students are debating whether switching energy
Q32: What is the MOST likely explanation for
Q35: Use the following data set and
Q38: What type of relationship does the following
Q40: Astronauts returning from outer space studied samples
Q47: Which of the following best estimates the
Q56: The spread of measles to individuals who