Scatterplot Review

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 association in a scatter plot indicate?

Back

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

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

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, minimizing the distance between the line and all data points.

Front

How can you determine if a line is a line of best fit?

Back

A line is a line of best fit if it goes through the middle of the data points and minimizes the overall distance from the points to the line.

Front

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

Back

No association means that there is no discernible relationship between the two variables; changes in one variable do not affect the other.

Front

How do you write an equation for a trend line?

Back

To write an equation for a trend line, identify the slope and y-intercept from the line and express it in the form y = mx + b, where m is the slope and b is the y-intercept.

Front

What is the slope of a line in a scatter plot?

Back

The slope of a line in a scatter plot indicates the rate of change of the dependent variable (y) with respect to the independent variable (x).

Front

What does a steep slope indicate in a scatter plot?

Back

A steep slope indicates a strong relationship between the variables, meaning that a small change in x results in a large change in y.