Variables
Outliers and Predictions
Correlations
Reading & Creating Scatterplots
Line of Best Fit
100
This variable goes on the x-axis. Independent or dependent?
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. Independent or dependent?
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
What is the correlation of this graph? Will the slope be positive or negative?
This graph shows a negative negative and 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 on the x axis or 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
How do you make predictions using a scatter plot?
1) Draw a line of best fit. 2) Determine the slope and y-intercept. 3) Write an equation and use it to make a prediction.
300
What are two points on the line of best fit?
Two points on the line of best fit are: (4, 1) and (3, 2)
400
On a graph showing the relationship between salary and years of experience which variable would be the on the y-axis or 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.
There is no linear correlation.
400
Free 400 points!
Thanks for all your hard work!
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
It is a way to predict values based on a "summary" of the data.
What is the line of best fit or trend line.
500
Give an example of a positive, negative, or no correlation. State both variables. Your group will decide if you get the points.
If you can't decide Mr. Forsythe will be the deciding person.
500
Create a scatter plot of this data.
Your should look like someone elses in the group.
500
Write a line of best fit, given these two points.
(2,6) & (-4, -6)
What is y = 2x + 2