Scatterplots

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 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 does no correlation mean in a scatterplot?

Back

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

Front

How can you identify the trend in a scatterplot?

Back

You can identify the trend by observing the direction of the data points; if they rise together, it's positive; if one rises while the other falls, it's negative.

Front

What is a trend line in a scatterplot?

Back

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

Front

How do you use a trend line to make predictions?

Back

You can extend the trend line to estimate values for one variable based on known values of the other variable.

Front

What is the purpose of using scatterplots?

Back

Scatterplots are used to visually represent relationships between two variables, making it easier to identify patterns, trends, and correlations.

Front

What is an example of a positive correlation?

Back

An example of a positive correlation is the relationship between hours studied and test scores; generally, more study hours lead to higher scores.

Front

What is an example of a negative correlation?

Back

An example of a negative correlation is the relationship between the amount of time spent watching TV and grades; more TV time often leads to lower grades.