drawing scatter plots
Correlations
line of best fit
analyzing data
100
What does CONSTANT SCALE mean?
A scale that increases by a consistent number.
100
When the values of one data set increases and the other decreases, this is called a ___________ correlation.
negative
100
Why do we draw a line of best fit?
To predict a trend.
100
What does it mean for the data if there is no correlation?
The sets of data have no relationship to each other
200
Line of best fit always has to be drawn with a straight edge (T/F)
True
200
When the values for both data sets increase this is called a _______________ correlation.
positive
200
If there is no correlation-is the line positive or negative?
There is no line!
200
What do we use a scatter plot for?
Analyzing if there is a relationship between two sets of data.
300

Which quadrant should be used to sketch a scatter plot?

A. All four quadrants

B. Quadrant III

C. Quadrant II

D. Quadrant I

D. Quadrant I

300

When the values of one set does not affect the values of the other?

No correlation

300
When most of the points are close to the line of best fit, but one is very far, this is called an _______________.
outlier
300
Do arm span and height have a strong or weak correlation?
Strong
400
Line of best fit should connect all the dots (T/F)
False
400
When most of the points very closely follow the line of best fit, this is called a _______________ correlation.
strong
400
Look at the diagram. This is a ___________ correlation. a. strong negative b. strong positive c. moderate negative d. weak positive e. weak negative
weak negative
400
If sales at a ski store increase as the temperature drops-is this a positive or negative correlation?
negative
500
What needs to be included on the X and Y axis along with the scale?
Labels
500

When the points on a scatter plot are scattered in the graph and do not follow a trend, this is called a ___________ correlation.

No correlation

500

How can you use a scatter plot to make predictions?

Use the trend line

500

Strong or weak correlation: Number of hours weekly spent on a computer and grade average

Weak

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