Scatter Plots

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 line of best fit represent in a scatter plot?

Back

A line of best fit is a straight line that best represents the data points in a scatter plot, indicating the trend of the data.

Front

How do you determine the equation of a line of best fit?

Back

The equation of a line of best fit can be determined using statistical methods such as linear regression, which calculates the slope and y-intercept based on the data points.

Front

What is a positive association in a scatter plot?

Back

A positive association occurs when an increase in one variable corresponds to an increase in another variable, resulting in an upward trend in the scatter plot.

Front

What is a negative association in a scatter plot?

Back

A negative association occurs when an increase in one variable corresponds to a decrease in another variable, resulting in a downward trend in the scatter plot.

Front

What does no association mean in a scatter plot?

Back

No association means that there is no discernible relationship between the two variables, and the data points do not show any clear trend.

Front

What is the purpose of using a trend line in a scatter plot?

Back

A trend line helps to summarize the relationship between the variables, making it easier to see patterns and make predictions.

Front

How can you use a scatter plot to make predictions?

Back

You can use a scatter plot to make predictions by extending the line of best fit to estimate values for one variable based on known values of the other variable.

Front

What is the slope of a line in a scatter plot?

Back

The slope of a line in a scatter plot indicates the rate of change between the two variables; a steeper slope means a greater change.

Front

What does the y-intercept represent in the context of a scatter plot?

Back

The y-intercept represents the value of the dependent variable when the independent variable is zero.