Scatterplots-Correlation & Best Fit Lines

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 a scatterplot?

Back

Correlation refers to the degree to which two variables move in relation to each other. It can be positive, negative, or zero.

Front

What is an outlier in a scatterplot?

Back

An outlier is a data point that differs significantly from other observations in the dataset, often appearing far away from the trend.

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 data.

Front

How do you identify the line of best fit?

Back

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

Front

What is the purpose of the line of best fit?

Back

The purpose of the line of best fit is to make predictions about one variable based on the value of another variable.

Front

What does a positive correlation look like on a scatterplot?

Back

A positive correlation is indicated by a pattern where, as one variable increases, the other variable also increases, resulting in an upward slope.

Front

What does a negative correlation look like on a scatterplot?

Back

A negative correlation is indicated by a pattern where, as one variable increases, the other variable decreases, resulting in a downward slope.

Front

What is the equation of a trend line?

Back

The equation of a trend line is a mathematical representation of the line of best fit, typically in the form y = mx + b, where m is the slope and b is the y-intercept.

Front

How can you use a trend line to make predictions?

Back

You can use a trend line to make predictions by substituting a value of x into the equation of the trend line to find the corresponding value of y.