Scatter Plots and Line of Best Fit Review - ch. 6 Flashcard

Front

What is a scatter plot?

Back

A scatter plot is a graph that shows the relationship between two quantitative variables by displaying data points on a two-dimensional axis.

Front

What does the line of best fit represent in a scatter plot?

Back

The line of best fit represents the trend in the data, showing the general direction that the data points follow.

Front

How can you identify a decreasing trend in a scatter plot?

Back

A decreasing trend is identified when the data points move downward from left to right.

Front

What is a cluster in a scatter plot?

Back

A cluster is a group of data points that are close together, indicating a concentration of values in that area.

Front

How do you predict values using a trend line?

Back

To predict values, extend the trend line and find the corresponding value on the other axis for a given input.

Front

What does it mean if there are no clusters in a scatter plot?

Back

If there are no clusters, it indicates that the data points are spread out evenly without any significant grouping.

Front

What is the purpose of using scatter plots?

Back

Scatter plots are used to visualize relationships between two variables and to identify trends, clusters, or outliers.

Front

How can you determine the correlation between two variables from a scatter plot?

Back

Correlation can be determined by observing the direction and strength of the trend in the scatter plot; a positive correlation slopes upward, while a negative correlation slopes downward.

Front

What does it mean if a scatter plot shows a strong positive correlation?

Back

A strong positive correlation means that as one variable increases, the other variable also tends to increase.

Front

What is the significance of the x-axis and y-axis in a scatter plot?

Back

The x-axis typically represents the independent variable, while the y-axis represents the dependent variable.