Definitions
The equation of a line
y = mx + b
The totals of the rows and columns in a frequency tables
Marginal Frequencies
The line drawn in a scatter plot to show correlation
Line of Best Fit
The correlation coefficient is represented by this lowercase letter
r
The set of all possible values of x
Domain
A cell in a frequency table that relates two specific variables
Joint Frequency
The slope of the correlation line is
Negative
The inequality for the correlation coefficient
-1<= r <= 1
The set of all possible values of y
Range
The joint frequency of 10th graders who watch TV for more than 5 hours
30
The age of someone that receives 15 emails
41-43
If the correlation coefficient is negative, the slope of the line of best fit is
Negative
A table showing relationships between two categorical variables
Frequency Table
The percent of students who watch between 5-9 that are in 11th grade
16.7%
The number of emails that someone may receive if they are 60 years old
9
The correlation of a scatter plot is strong if the correlation coefficient |r| is close to
1
A graph that shows trends between two quantitative variables
The difference between the percent of students who watch 1-4 hours of TV and the students who watch more than 9 hours of TV
14.4%
The FORM of the given scatter plot
Linear
The value for r that would best represent the given scatterplot
r=0.8, r=-0.4, r=-0.9, r=0.4
r=-0.6