Scatterplots & Trendlines

Front

What is a scatterplot?

Back

A scatterplot is a graph that displays values for typically two variables for a set of data. Each point represents an observation in the dataset.

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 is a line of best fit?

Back

A line of best fit is a straight line that best represents the data on a scatterplot, showing the overall trend of the data.

Front

How can you identify a strong correlation in a scatterplot?

Back

A strong correlation is indicated by points that are closely clustered around the line of best fit.

Front

What does it mean if there is no correlation in a scatterplot?

Back

No correlation means that there is no apparent relationship between the two variables; the points are scattered randomly.

Front

What is the purpose of using a trendline in a scatterplot?

Back

A trendline helps to visualize the direction and strength of the relationship between the variables.

Front

How can you use a scatterplot to make predictions?

Back

You can use a scatterplot and the line of best fit to estimate the value of one variable based on the value of another.

Front

What is the difference between a strong and weak correlation?

Back

A strong correlation has points that are close to the line of best fit, while a weak correlation has points that are more spread out.

Front

What does the slope of the line of best fit represent?

Back

The slope represents the rate of change between the two variables; a steeper slope indicates a stronger relationship.