Variables
Real World Correlation
Types of Correlation
Miscellaneous
Line of Best Fit
100
This variable goes on the x-axis.
What is the independent variable?
100
What type of correlation exists between the age of your car and its value?
What is a negative correlation.
100
What type of correlation does this graph show? Strong or Weak? Positive or Negative?
What is a strong positive correlation?
100
What is the y-intercept of the graph y = 3x + 7? Write your answer as a coordinate pair.
What is (0, 7).
100
How do you determine where to place the line of best fit?
There should be an equal number of points above and below the line.
200
This variable is impacted by the other variable and is placed on the y-axis.
What is the dependent variable?
200
What type of correlation exists between height and IQ?
What is no correlation.
200
What type of correlation is shown in the scatter plot?
What is a strong negative correlation?
200
Determine the slope-intercept EQUATION of a line that passes through (2, -1) and (0,5).
What is y = -3x + 5.
200
Two points on the line of best fit are (4, 85) and (2, 70).
Find the slope for the line of best fit using these points.
15/2
300
If I am graphing the number of shots made and the hours of practice for a player, which would be the independent variable?
What is the number of hours of practice?
300
What type of correlation exists between hours worked and amount earned?
What is a positive correlation.
300
What would the correlation coefficient most likely be for this scatterplot?
What is 0?
300
Write the slope-intercept equation of a line that passes through (3, -2) and (6, -1)
What is y = 1/3x - 3.
300
What is the correlation coefficient of the following data?
Height Weight
5.3, 140
5.7, 160
5.3, 130
6, 200
5.8, 165
What is 0.90948.
400
On a graph showing the relationship between salary and years of experience which variable would be the dependent variable?
What is salary?
400
What type of correlation exists between the number of customers at an ice cream shop and the temperature outside.
What is a positive correlation.
400
Describe what a positive correlation means for data.
When one variable increases the other variable will also increase.
400
Write an equation that has an undefined slope.
What is x = #.
400
Using the line of best fit for the following data, determine exactly how much a person who is 5.5 would weight?
Height Weight
5.3, 140
5.7, 160
5.3, 130
6, 200
5.8, 165
What is 149 pounds.
500
Write a sentence describing a reasonable relationship between the average daily temperature and the number of beach visitors.
The number of beach visitors increases as the average daily temperature increases.
500
What type of correlation exists between cigarettes smoked per day and lung capacity?
What is a negative correlation.
500
Rank the following from weakest to strongest correlation coefficient.
-0.2, 0.5, -0.9, 0.95, -0.1, -0.7, -0.4
What is -0.1, -0.2, -0.4, 0.5, -0.7, 0.95
500
Solve for r.
A = (pi)r^2.
What is square root(A/pi)
500
Using the line of best fit, determine the rough height of someone who weighs 115. Height Weight 5.3, 140 5.7, 160 5.3, 130 6, 200 5.8, 165
What is roughly 5 feet.