Interpreting and making predictions with Scatter Plots

Front

What is a scatter plot?

Back

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

Front

What does the line of best fit represent in a scatter plot?

Back

The line of best fit is a straight line that best represents the data on a scatter plot, indicating the general direction of the relationship between the variables.

Front

How can you determine the correlation from a scatter plot?

Back

You can determine the correlation by observing the direction of the data points: a positive correlation shows an upward trend, a negative correlation shows a downward trend, and no correlation shows no clear trend.

Front

What is a positive correlation?

Back

A positive correlation occurs when an increase in one variable leads to an increase in another variable, resulting in an upward trend in the scatter plot.

Front

What is a negative correlation?

Back

A negative correlation occurs when an increase in one variable leads to a decrease in another variable, resulting in a downward trend in the scatter plot.

Front

What does 'no correlation' mean in a scatter plot?

Back

'No correlation' means that there is no apparent relationship between the two variables, and the data points do not show any clear trend.

Front

What is the purpose of making predictions with scatter plots?

Back

The purpose of making predictions with scatter plots is to estimate the value of one variable based on the value of another variable using the observed relationship.

Front

How do you use a scatter plot to make a prediction?

Back

To make a prediction using a scatter plot, locate the value of the independent variable on the x-axis, find the corresponding point on the scatter plot, and read the value of the dependent variable on the y-axis.

Front

What is an example of a situation where a scatter plot might be used?

Back

A scatter plot might be used to show the relationship between hours studied and exam scores among students.

Front

What is the significance of outliers in a scatter plot?

Back

Outliers are data points that fall far from the trend of the rest of the data; they can significantly affect the line of best fit and the overall interpretation of the data.