Scatterplots and Trend Lines Review

Front

What is a scatterplot?

Back

A scatterplot is a graph that shows the relationship between two quantitative variables by displaying data points on a two-dimensional axis.

Front

What does correlation mean in the context of scatterplots?

Back

Correlation refers to the strength and direction of a relationship between two variables, which can be positive, negative, or none.

Front

What is a weak negative correlation?

Back

A weak negative correlation indicates that as one variable increases, the other variable tends to decrease slightly, but the relationship is not strong.

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 scatterplot, showing the general direction of the relationship between the variables.

Front

How can you determine the line of best fit on a scatterplot?

Back

The line of best fit can be determined by visually assessing the data points and drawing a line that minimizes the distance from all points to the line.

Front

What does it mean if there is no relationship between two variables?

Back

If there is no relationship, changes in one variable do not affect the other variable, and the scatterplot will show a random pattern.

Front

What is a positive linear relationship?

Back

A positive linear relationship means that as one variable increases, the other variable also increases, and the data points form a straight line.

Front

What is a negative linear relationship?

Back

A negative linear relationship means that as one variable increases, the other variable decreases, and the data points form a straight line.

Front

What is a quadratic relationship?

Back

A quadratic relationship is a type of relationship where the data points form a curve, typically represented by a parabolic shape on a graph.

Front

How do you interpret the slope of the line of best fit?

Back

The slope indicates the rate of change between the two variables; a positive slope means an increase, while a negative slope means a decrease.