Scatter Plots and Trend Lines

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 positive linear association in a scatter plot indicate?

Back

A positive linear association indicates that as one variable increases, the other variable also tends to increase.

Front

What does a negative linear association in a scatter plot indicate?

Back

A negative linear association indicates that as one variable increases, the other variable tends to decrease.

Front

What is a non-linear association in a scatter plot?

Back

A non-linear association occurs when the relationship between the variables cannot be accurately represented by a straight line.

Front

What does 'no association' mean in the context of scatter plots?

Back

'No association' means that there is no discernible relationship between the two variables being plotted.

Front

What is a trend line?

Back

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

Front

How do you write an equation of a trend line in slope-intercept form?

Back

Front

What does the slope of a trend line represent?

Back

The slope of a trend line represents the rate of change of the dependent variable with respect to the independent variable.

Front

What does the y-intercept of a trend line represent?

Back

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

Front

How can you use a trend line to make predictions?

Back

You can use the equation of the trend line to predict the value of the dependent variable for a given value of the independent variable.