Scatter Plots and Lines of Best Fit

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 a positive correlation indicate in a scatter plot?

Back

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

Front

What does a negative correlation indicate in a scatter plot?

Back

A negative correlation indicates that as one variable increases, the other variable tends to decrease.

Front

What is an outlier in a scatter plot?

Back

An outlier is a data point that is significantly different from other data points in the scatter plot, often lying far away from the trend.

Front

What is the line of best fit?

Back

The line of best fit is a straight line that best represents the data on a scatter plot, showing the overall trend of the data.

Front

How can you identify the line of best fit?

Back

The line of best fit can be identified by visually assessing which line minimizes the distance between itself and all the data points.

Front

What does it mean if there is no correlation in a scatter plot?

Back

No correlation means that there is no apparent relationship between the two variables; changes in one variable do not predict changes in the other.

Front

How do you use a trend line to make predictions?

Back

You can use a trend line to make predictions by extending the line and finding the corresponding value on the other axis for a given input.

Front

What is the purpose of analyzing scatter plots?

Back

The purpose of analyzing scatter plots is to understand the relationship between two variables and to identify trends, patterns, or anomalies.

Front

What is the significance of the slope of the line of best fit?

Back

The slope of the line of best fit indicates the rate of change between the two variables; a steeper slope means a stronger relationship.