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 the line of best fit represent in a scatterplot?

Back

The line of best fit represents the trend of the data points in a scatterplot, indicating the general direction of the relationship between the variables.

Front

What is correlation in the context of scatterplots?

Back

Correlation refers to the strength and direction of a relationship between two variables, which can be positive, negative, or none.

Front

What does a positive correlation indicate?

Back

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

Front

What does a negative correlation indicate?

Back

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

Front

What does no correlation mean?

Back

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

Front

How can you estimate values using a scatterplot?

Back

You can estimate values by using the line of best fit to predict the value of one variable based on the value of another.

Front

What is the purpose of using a line of best fit?

Back

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

Front

How do you determine the slope of the line of best fit?

Back

The slope of the line of best fit is determined by the change in the y-values divided by the change in the x-values between two points on the line.

Front

What is the significance of outliers in a scatterplot?

Back

Outliers are data points that differ significantly from other observations; they can affect the line of best fit and the overall interpretation of the data.