Scatter Plots and Line 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 grid.

Front

What does the line of best fit represent in a scatter plot?

Back

The line of best fit represents the trend of the data points in a scatter plot, showing the general direction in which the data points are moving.

Front

What is the y-intercept of a line?

Back

The y-intercept is the point where the line crosses the y-axis, indicating the value of y when x is zero.

Front

How do you determine the slope of a line?

Back

The slope of a line is determined by the change in y divided by the change in x (rise over run) between two points on the line.

Front

What is an outlier in a scatter plot?

Back

An outlier is a data point that is significantly different from other observations, often lying far away from the main cluster of points.

Front

What does a positive association in a scatter plot indicate?

Back

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

Front

What does a negative association in a scatter plot indicate?

Back

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

Front

What is the purpose of the line of best fit?

Back

The purpose of the line of best fit is to provide a visual representation of the relationship between two variables and to make predictions based on that relationship.

Front

How can you estimate a value using a scatter plot?

Back

You can estimate a value by locating the corresponding x-value on the scatter plot and finding the y-value on the line of best fit.

Front

What does it mean if a scatter plot shows no association?

Back

No association means that there is no discernible relationship between the two variables; the data points are scattered randomly.