Scatter Plots and Trend Lines (Unit 5 Review)

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 a trend line represent in a scatter plot?

Back

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

Front

What is a positive linear association?

Back

A positive linear association occurs when an increase in one variable corresponds to an increase in another variable, resulting in an upward slope on the graph.

Front

What is a negative linear association?

Back

A negative linear association occurs when an increase in one variable corresponds to a decrease in another variable, resulting in a downward slope on the graph.

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 are scattered randomly.

Front

What is a nonlinear association?

Back

A nonlinear association occurs when the relationship between two variables cannot be accurately represented by a straight line.

Front

How do you determine the line of best fit?

Back

The line of best fit is determined by minimizing the distance between the data points and the line, often using methods like least squares.

Front

What is the equation of a line in slope-intercept form?

Back

Front

What does the slope of a trend line indicate?

Back

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

Front

What is the y-intercept in a linear equation?

Back