Scatterplots and Trendlines

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 a trendline represent in a scatterplot?

Back

A trendline represents the general direction or pattern of the data points in a scatterplot, often used to indicate the line of best fit.

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, minimizing the distance between the line and the data points.

Front

How can you determine if a line is a line of best fit?

Back

A line is a line of best fit if it passes through the middle of the data points, balancing the distances from the points to the line.

Front

What does a negative association in a scatterplot indicate?

Back

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

Front

How do you use a trendline to make predictions?

Back

You can use a trendline to make predictions by extending the line and finding the corresponding value of the dependent variable for a given independent variable.

Front

What is the purpose of using a scatterplot?

Back

The purpose of using a scatterplot is to visually assess the relationship between two quantitative variables.

Front

What does it mean if a scatterplot has no clear trend?

Back

If a scatterplot has no clear trend, it suggests that there is no significant relationship between the two variables being analyzed.

Front

How can outliers affect the line of best fit?

Back

Outliers can skew the line of best fit, making it less representative of the overall data set.

Front

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

Back

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