Scatter Plots and Trend Lines

Front

What is a line of best fit used for?

Back

To make predictions.

Front

What type of association exists when the number of notebooks bought increases and the total cost also increases?

Back

Positive association.

Front

If the temperature is around 80°, how many guests should be expected based on the trend line?

Back

8,300.

Front

What is the type of association when there is no clear relationship between two variables?

Back

No association.

Front

Are there any outliers in the data set if one point is (45, 8)?

Back

Yes, (45, 8).

Front

What does a scatter plot represent?

Back

A scatter plot represents the relationship between two quantitative variables.

Front

What is a trend line?

Back

A trend line is a straight line that best represents the data on a scatter plot.

Front

How can you identify a positive association in a scatter plot?

Back

If the points tend to rise from left to right.

Front

How can you identify a negative association in a scatter plot?

Back

If the points tend to fall from left to right.

Front

What does it mean if a scatter plot has no association?

Back

The points are scattered randomly and do not show any clear trend.