The following scatter plot depicts the number of chicken pox cases after 1988. The variable x represents the number of years after 1988. The variable y represents the number of cases in thousands.
200
280
260
Reported Cases (thousands)
140
220
4
200
0 2 2 3 5 6
Number of years after 1988
Does there appear to be a linear relationship? Explain your answer.
a. Yes, there is a linear relationship. The data appears to have a negative correlation.
b. Yes, there is a linear relationship. The data appears to have a positive correlation.
C. No, there is not a linear relationship. The data seems random.
d. No, there is not a linear relationship. There is no line which goes through all the points.