Lesson 4.4/4.5 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 a positive correlation indicate in a scatter plot?

Back

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

Front

What does a negative correlation indicate in a scatter plot?

Back

A negative correlation indicates that as one variable increases, the other variable decreases.

Front

What is the purpose of a trend line in a scatter plot?

Back

A trend line helps to visualize the general direction of the data points and can indicate the relationship between the variables.

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 scatter plot, minimizing the distance between the line and all data points.

Front

How can you determine if there is a correlation in a scatter plot?

Back

You can determine correlation by observing the pattern of the data points; if they form a clear upward or downward trend, there is a correlation.

Front

What does it mean if a scatter plot shows no correlation?

Back

No correlation means that there is no discernible pattern or relationship between the two variables being plotted.

Front

What is the correlation coefficient?

Back

The correlation coefficient is a numerical measure that indicates the strength and direction of a linear relationship between two variables.

Front

How can you approximate values using a scatter plot?

Back

You can approximate values by locating the corresponding x-value on the scatter plot and finding the associated y-value along the trend line.

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 correlation.