Scatterplots and Trendlines

Front

What is a scatter plot?

Back

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

Front

What does a trend line represent in a scatter plot?

Back

A trend line represents the general direction or pattern of the data points in a scatter plot, helping to visualize 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 the data points.

Front

How can you use a line of best fit?

Back

You can use a line of best fit to make predictions about one variable based on the value of another variable.

Front

What does a positive correlation in a scatter plot indicate?

Back

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

Front

What does a negative correlation in a scatter plot indicate?

Back

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

Front

What does no correlation mean in a scatter plot?

Back

No correlation means there is no apparent relationship between the two variables; the data points do not follow a clear pattern.

Front

How do you determine the line of best fit visually?

Back

You determine the line of best fit visually by drawing a line that has approximately equal numbers of points above and below it.

Front

What is the purpose of using a trend line in data analysis?

Back

The purpose of using a trend line is to summarize the data and make it easier to identify patterns and make predictions.

Front

What is interpolation in the context of scatter plots?

Back

Interpolation is the process of estimating a value within the range of the data points using the trend line.