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 grid.

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 is positive correlation?

Back

Positive correlation means that as one variable increases, the other variable also increases.

Front

What is negative correlation?

Back

Negative correlation means that as one variable increases, the other variable decreases.

Front

What does it mean if there is no correlation?

Back

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

Front

How do you determine the line of best fit?

Back

The line of best fit is determined by finding the line that minimizes the distance between itself and all the data points in the scatterplot.

Front

What is the x-axis in a scatterplot?

Back

The x-axis is the horizontal axis that typically represents the independent variable.

Front

What is the y-axis in a scatterplot?

Back

The y-axis is the vertical axis that typically represents the dependent variable.

Front

How can you use a scatterplot to make predictions?

Back

You can use a scatterplot to make predictions by extending the trend line to estimate values for the dependent variable based on known values of the independent variable.

Front

What does it mean if the points on a scatterplot are tightly clustered around the trend line?

Back

If the points are tightly clustered around the trend line, it indicates a strong correlation between the two variables.