Scatter plots- 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 line of best fit represent in a scatter plot?

Back

A line of best fit represents the trend of the data points in a scatter plot, indicating the general direction in which the data points are moving.

Front

TRUE OR FALSE: A line of best fit must go through the origin.

Back

False

Front

What are outliers in a scatter plot?

Back

Outliers are data points that are significantly different from the other points in the dataset, often lying far away from the trend line.

Front

How do you identify an outlier in a scatter plot?

Back

An outlier can be identified as a point that lies far away from the cluster of other data points.

Front

TRUE OR FALSE: Data points that lie above the trend line should be about the same distance as data points below the trend line.

Back

True

Front

What is the purpose of a line of best fit?

Back

The purpose of a line of best fit is to summarize the relationship between the variables and make predictions based on the data.

Front

What does a positive slope in a line of best fit indicate?

Back

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

Front

What does a negative slope in a line of best fit indicate?

Back

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

Front

What is the formula for calculating the slope of a line?

Back

The slope (m) is calculated using the formula m = (y2 - y1) / (x2 - x1), where (x1, y1) and (x2, y2) are two points on the line.