Correlations
Variables
Line of Best Fit
Vocabulary
R-Value
100
Choice C is Positive
100
Is Eye Colour a Categorical or Numerical variable?
Categorical
100
If you drew a trend line through the data points below, would the association be strong or weak? 
Strong
100
Data for two variables is called
A) Univariate
B) Multivariate
C) Bivariate
C) Bivariate
100
What is the range of all possible r- values?
-1 to 1
200
Choice B
200
Is daily temperature a categorical or numerical variable?
Numerical
200
True or False:
A line of best fit are used on non-linear scatter plots
False
200
True or False
The x represents the independent Variable and the y represents the dependent variable
True
200
An r-value close to 1 indicates what?
A strong positive relationship
300
Choice D
300
Is height a continuous or discrete?
continuous
300
True or False:
The line of best fit can help us make predictions about data.
True
300
What type of correlation occurs when both the x and y variables increase?
Positive
300
A negative r value indicates what?
A negative relationship
400
Graph C
400
Is number of texts you receive in a day continuous or discrete?
discrete
400
Which of the lines shown is a reasonable trend line for the scatter plot?
Line U (brown line)
400
What type of correlation would be a result of:
Outdoor temperature and amount paid to heat the house.
Negative Correlation
400
An r value of 0.56 indicates what type of relationship?
A moderate positive relationship
500
Choice A
500
Give an example of a discrete numerical variable
multiple solutions.
500
The scatter plot shows the average height of people ages 2-12 in a certain country. Which of the lines shown is a reasonable trend line for the scatter plot? Explain your reasoning.
Linke K (blue line)
500
Another word for “rate of change” is__________
Slope
500
An r-value of -0.97 indicates what type of relationship?
A strong negative relationship