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 scatter plot, showing the trend of the data points.

Front

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

Back

You can determine the line of best fit by visually inspecting the scatter plot and drawing a line that minimizes the distance between the line and all data points.

Front

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

Back

A positive slope indicates a positive correlation between the two variables, meaning as one variable increases, the other also increases.

Front

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

Back

A negative slope indicates a negative correlation between the two variables, meaning as one variable increases, the other decreases.

Front

What is the purpose of using a trend line in data analysis?

Back

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

Front

What is a scatter plot?

Back

A scatter plot is a graph that displays values for two variables for a set of data, showing how one variable is affected by another.

Front

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

Back

If a scatter plot shows no association, it means there is no discernible relationship between the two variables.

Front

What is linear regression?

Back

Linear regression is a statistical method used to model the relationship between a dependent variable and one or more independent variables by fitting a linear equation to observed data.

Front

How can you use a linear regression equation to make predictions?

Back

You can use a linear regression equation by substituting the value of the independent variable into the equation to calculate the predicted value of the dependent variable.

Front

What is the significance of the y-intercept in a linear equation?

Back

The y-intercept is the value of the dependent variable when the independent variable is zero, indicating where the line crosses the y-axis.