Scatterplots

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 line of best fit represent in a scatterplot?

Back

A line of best fit is a straight line that best represents the data points in a scatterplot, indicating the trend or direction of the relationship between the variables.

Front

What is correlation 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 does a positive correlation look like on a scatterplot?

Back

A positive correlation appears as an upward trend, where as one variable increases, the other variable also increases.

Front

What does a negative correlation look like on a scatterplot?

Back

A negative correlation appears as a downward trend, where as one variable increases, the other variable decreases.

Front

What is the purpose of using a line of best fit?

Back

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

Front

How can you determine the cost of a service using a scatterplot?

Back

You can determine the cost of a service by finding the corresponding point on the line of best fit for the given variable (e.g., time) and reading the value on the other axis (e.g., cost).

Front

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

Back

If there is no correlation, it means that there is no discernible relationship between the two variables, and the data points are scattered randomly.

Front

What is an example of a situation that might show a negative correlation?

Back

An example of a negative correlation is the relationship between the outside temperature and the number of people wearing gloves; as temperature increases, the number of people wearing gloves decreases.

Front

What is an example of a situation that might show a positive correlation?

Back

An example of a positive correlation is the relationship between study time and test scores; as study time increases, test scores tend to increase.