Scatterplots

Front

What is a scatterplot?

Back

A scatterplot is a graphical representation of two variables, showing the relationship between them using points on a Cartesian plane.

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 average relationship between the two variables.

Front

How can you determine the average value from a scatterplot?

Back

You can determine the average value by using the line of best fit to estimate the corresponding value of the dependent variable for a given independent variable.

Front

What is correlation in the context of scatterplots?

Back

Correlation refers to the degree to which two variables are related, which can be positive, negative, or no correlation.

Front

What does a positive correlation indicate in a scatterplot?

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 scatterplot?

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 that there is no discernible relationship between the two variables; changes in one variable do not predict changes in the other.

Front

How can you predict values using a scatterplot?

Back

You can predict values by identifying the trend in the scatterplot and using the line of best fit to estimate the value of one variable based on the other.

Front

What is the significance of outliers in a scatterplot?

Back

Outliers are data points that deviate significantly from the trend of the rest of the data, which can affect the accuracy of the line of best fit.

Front

What is the formula for calculating the slope of the line of best fit?

Back

The slope of the line of best fit can be calculated using the formula: (change in y) / (change in x) between two points on the line.