Scatter Plots, Line of Best Fit, and Two Way Tables

Front

What is a scatter plot?

Back

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

Front

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

Back

The 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 estimate values using a line of best fit?

Back

You can estimate values by locating the desired x-value on the horizontal axis and then finding the corresponding y-value on the line of best fit.

Front

What is the purpose of a two-way table?

Back

A two-way table displays the frequency distribution of two categorical variables, allowing for the analysis of relationships between them.

Front

How do you calculate the probability from a two-way table?

Back

To calculate probability, divide the frequency of the desired outcome by the total number of observations in the table.

Front

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

Back

The slope (m) is calculated as (change in y) / (change in x) between two points on the line.

Front

What does a negative slope indicate in a line of best fit?

Back

A negative slope indicates that as one variable increases, the other variable decreases.

Front

How can you use a scatter plot to make predictions?

Back

You can use a scatter plot to make predictions by analyzing the trend shown by the line of best fit and estimating values for unknown data.

Front

What is the significance of the correlation coefficient in scatter plots?

Back

The correlation coefficient measures the strength and direction of a linear relationship between two variables, ranging from -1 to 1.

Front

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

Back

No correlation means there is no discernible relationship between the two variables, and the data points are scattered randomly.