Scatterplots & Trend Lines

Front

What is a scatterplot?

Back

A scatterplot is a type of graph that shows the relationship between two 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, showing the general direction of the data.

Front

What does it mean if a scatterplot shows a positive association?

Back

A positive association means that as one variable increases, the other variable also tends to increase.

Front

What does it mean if a scatterplot shows a negative association?

Back

A negative association means that as one variable increases, the other variable tends to decrease.

Front

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

Back

No association means that changes in one variable do not affect the other variable.

Front

How can you determine the trend from a scatterplot?

Back

You can determine the trend by observing the overall direction of the data points; if they rise, it's positive; if they fall, it's negative.

Front

What is the purpose of using a scatterplot?

Back

The purpose of using a scatterplot is to visually display the relationship between two variables and identify any patterns.

Front

What is an example of a variable that might be plotted against test scores?

Back

An example could be the number of hours studied before the test.

Front

If a student has 6 absences, how can you find their expected exam score from a scatterplot?

Back

You would locate 6 absences on the x-axis and see where it intersects with the trend line to find the corresponding exam score.

Front

What does it mean if a trend line slopes upwards?

Back

If a trend line slopes upwards, it indicates a positive relationship between the two variables.