Examine each scatterplot and identify each as showing a positive correlation, a negative correlation or no correlation. ​ ​ ​ ​ ​

a

postive correlation

no correlation

negative correlation

Answer explanation

Examine the scatterplot below and identify it as showing a positive correlation, a negative correlation or no correlation.

b

no correlation

negative correlation

positive correlation

Examine the scatterplot below and identify it as showing a positive correlation, a negative correlation or no correlation.

c

no correlation

negative correlation

positive correlation

The enrollment at North Shore High School is given below. Year is x; enrollment is y. (2006,801), (2007,834), (2008,844), (2009,897), (2010,922). Construct a scatterplot to depict the data. Describe the correlation from the scatterplot.

Some enrollment data about Cold Spring Hills High School is given below. X value is the year, the y value is the enrollment. (2006, 1233), (2007, 1144), (2008, 8988), (2009, 9902) (2010, 870). a) Construct a scatterplot. b) Are the years and enrollments negatively or positively correlated?

In a strong relationship between two variables in a scatterplot, the data closely follows a _______.

• Line

• Pattern

• Constant

Which of the following scatterplots show no association?

Select all that apply

• 
• 
• 
• 

What should a proper scatterplot have?

• Title

• Axis labeled with explanatory and response variable with units

• Scale of graph

A strong positive correlation has a r close to_____

• 0.93

• 0.49

• -1

• 0

A weak negative correlation has a r close to _______

• -1

• -0.49

• 0.93

• 0