Scatter Plots & Lines of Best Fit

Front

What is a scatter plot?

Back

A scatter plot is a graph that shows the relationship between two quantitative variables by displaying data points on a two-dimensional axis.

Front

What does a positive correlation in a scatter plot 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 scatter plot indicate?

Back

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

Front

What does 'no association' mean in the context of scatter plots?

Back

'No association' means that there is no discernible relationship between the two variables being plotted.

Front

How do you determine the line of best fit in a scatter plot?

Back

The line of best fit is determined by drawing a line that best represents the data points, minimizing the distance between the line and all points.

Front

What is the purpose of a line of best fit?

Back

The purpose of a line of best fit is to summarize the relationship between the variables and to make predictions based on the data.

Front

What does it mean if a scatter plot shows a cluster of points?

Back

A cluster of points indicates that there is a strong relationship between the two variables in that region.

Front

What is an outlier in a scatter plot?

Back

An outlier is a data point that lies significantly outside the range of the other points, which can affect the line of best fit.

Front

How can you interpret the slope of the line of best fit?

Back

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

Front

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

Back

The y-intercept is the value of the dependent variable when the independent variable is zero, providing a starting point for the relationship.