Making Predictions and Reading 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 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 does 'no correlation' mean in the context of a scatterplot?

Back

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

Front

How can you use a trend line in a scatterplot?

Back

A trend line can be used to predict values by showing the general direction of the data points.

Front

If a scatterplot shows a negative correlation between days absent and math grades, what can be inferred?

Back

It can be inferred that more days absent from school are associated with lower math grades.

Front

How do you predict a value using a scatterplot?

Back

To predict a value, locate the known value on the axis, follow it up to the trend line, and then read across to find the predicted value on the other axis.

Front

What is the significance of the x-axis and y-axis in a scatterplot?

Back

The x-axis typically represents the independent variable, while the y-axis represents the dependent variable.

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; more study time usually leads to higher test scores.

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 number of hours spent playing video games and academic performance; more gaming time may lead to lower grades.