DONT PICK ME
Outliers and Predictions
Correlations
Reading & Creating Scatterplots
Line of Best Fit
100
This variable goes on the x-axis.
What is the independent variable?
100
What is an outlier?
What is a point that is distant (skewed) from the rest of the data?
100
What type of correlation does this graph show?
What is positive?
100
What are two points on the line of best fit?
What is (16,300) and (22,500)
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
Which point is the outlier?
What is approximately (30, 6000)?
200
What type of correlation is shown in the scatter plot?
What is negative?
200
Will the slope of the line of best fit be positive or negative?
The line will have a negative slope.
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
Based on the scatter plot how many CDs would be sold for 2 jars of jam?
What is about 15 CDs?
300
What type of correlation is shown? Write a sentence describing the impact or lack of impact that impulsiveness has on empathy.
What is no correlation? Impulsiveness has no impact on empathy.
300
What are the things we can do to be able to FULLY analyze a scatter plot?
(There are 5 things for a perfect answer)
1) Identify the correlation
2) Analyze the meaning
3) Draw a line of best fit.
4) Determine the slope and y-intercept.
5) Write an equation and use it to make a prediction.
300
Two points on the line of best fit are: (4, 1) and (3, 2). What is the slope of the line??
Slope = -1
400
On a graph showing the relationship between salary and years of experience which variable would be the dependent variable?
What is salary?
400
If a person is 45 years old, based on the scatter plot, what should they expect their income to be?
What is about 45,000.
400
Describe what a positive correlation means for data.
When one variable increases the other variable will also increase.
400
Describe the correlation of this data. Is it linear or nonlinear?
There is no linear correlation.
400
For the following line of best fit, what is the slope AND what does the slope mean?
http://moodle2.rockyview.ab.ca/pluginfile.php/64101/mod_book/chapter/25070/m30_2_m4/images/m4/m30_2_m4_021.jpg
Slope = 191
It means that each day of vacation you are spending about $191
500
Write a sentence describing the 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
Why should all points be as close to the line as possible? (Why should we try to draw the BEST line?)
So that our data is actually being represented. The line needs to match the data we have.
500
Give an example of two things that are NOT related. (Their graph would have NO correlation)
Answers will vary.
500
Describe the correlation of this data. Is it linear or nonlinear?
There is no linear correlation.
500
What is the y-intercept of this graph? What does the y-intercept MEAN?
https://cobbk12.blackboard.com/bbcswebdav/institution/eHigh%20School/Courses/CCVA%20CCGPS%20Coordinate%20Algebra/Curriculum/Unit%204/U4_FittingDataToModelAndCorrelation/paste_image20.jpg
Y-intercept = about 65
It means that if you don't study at all, you may get a 65.