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 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 represents the trend of the data points, showing the overall direction of the relationship between the two variables.

Front

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

Back

The slope of a line of best fit is determined by the change in the y-values divided by the change in the x-values (rise over run).

Front

What is a positive correlation in a scatter plot?

Back

A positive correlation occurs when an increase in one variable corresponds to an increase in another variable, resulting in an upward trend.

Front

What is a negative correlation in a scatter plot?

Back

A negative correlation occurs when an increase in one variable corresponds to a decrease in another variable, resulting in a downward trend.

Front

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

Back

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

Front

What is a linear association in a scatter plot?

Back

A linear association indicates that the data points can be approximated by a straight line, showing a consistent relationship.

Front

What is a nonlinear association in a scatter plot?

Back

A nonlinear association indicates that the relationship between the variables cannot be represented by a straight line, often showing curves or other patterns.

Front

How can you use a scatter plot to make predictions?

Back

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

Front

What is the formula for a line of best fit?

Back

The formula for a line of best fit is typically expressed in the form y = mx + b, where m is the slope and b is the y-intercept.