Scatterplot Predictions

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 a positive correlation indicate in a scatterplot?

Back

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

Front

What does a negative correlation indicate in a scatterplot?

Back

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

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, used to make predictions.

Front

How can you use a scatterplot to make predictions?

Back

You can use a scatterplot to make predictions by extending the line of best fit to estimate values for variables not directly measured.

Front

What is the purpose of a trend line in a scatterplot?

Back

The purpose of a trend line is to summarize the relationship between the variables and to help in making predictions.

Front

What does it mean if there is no correlation in a scatterplot?

Back

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

Front

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

Back

The slope indicates the rate of change between the two variables; a steeper slope means a stronger relationship.

Front

What is the significance of outliers in a scatterplot?

Back

Outliers are data points that differ significantly from other observations; they can affect the line of best fit and predictions.

Front

What is the first step in analyzing a scatterplot?

Back

The first step is to observe the overall pattern of the data points to determine the type of relationship (positive, negative, or none).