Scatterplots & Trend Lines

Front

What is a scatterplot?

Back

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

Front

What does a trend line represent in a scatterplot?

Back

A trend line is a straight line that best represents the data points in a scatterplot, indicating the general direction of the data.

Front

What does a positive correlation in a scatterplot indicate?

Back

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

Front

What does a negative correlation in a scatterplot indicate?

Back

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

Front

What is a linear relationship in a scatterplot?

Back

A linear relationship is when the data points in a scatterplot can be approximated by a straight line.

Front

What is a nonlinear relationship in a scatterplot?

Back

A nonlinear relationship is when the data points in a scatterplot do not follow a straight line and may curve or cluster.

Front

How do you interpret the coordinates of a point on a scatterplot?

Back

The x-coordinate represents the value of the independent variable, while the y-coordinate represents the value of the dependent variable.

Front

What is the purpose of using scatterplots in data analysis?

Back

Scatterplots are used to visually assess the relationship between two variables and to identify trends, patterns, or outliers.

Front

What does it mean if a scatterplot shows a cluster of points?

Back

A cluster of points indicates that there is a concentration of data values in that area, suggesting a common relationship.

Front

How can you determine if a scatterplot has a strong correlation?

Back

A strong correlation is indicated by data points that are closely packed around the trend line, showing a clear relationship.