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 in a scatterplot indicate?

Back

A positive correlation indicates that as one variable increases, the other variable also tends to increase.

Front

What does a negative correlation in a scatterplot indicate?

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 trend of the data.

Front

How do you determine the type of association in a scatterplot?

Back

You determine the type of association by observing the direction of the points: upward (positive), downward (negative), or no clear trend (none).

Front

What is the equation of a line in slope-intercept form?

Back

Front

What does the slope of a line represent in a scatterplot?

Back

The slope of a line represents the rate of change between the two variables in the scatterplot.

Front

What is the y-intercept in a line of best fit?

Back

Front

How can you use a line of best fit to make predictions?

Back

You can use the line of best fit to estimate the value of one variable based on the value of the other variable.

Front

What is the purpose of analyzing scatterplots?

Back

The purpose of analyzing scatterplots is to identify relationships between variables and to understand how they interact.