Trend Lines and Scatter Plots

Front

What is a trend line?

Back

A trend line is a straight line that best represents the data on a scatter plot, showing the general direction of the data points.

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 tends to increase.

Front

What does a negative correlation indicate in a scatter plot?

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 predictable relationship between the two variables; the data points do not follow any pattern.

Front

How can you use a trend line to make predictions?

Back

You can use a trend line to estimate the value of one variable based on the value of another variable by finding the corresponding point on the line.

Front

What is a scatter plot?

Back

A scatter plot is a graph that shows the relationship between two data sets by displaying points for each pair of values.

Front

What is the purpose of a scatter plot?

Back

The purpose of a scatter plot is to visually display the relationship between two quantitative variables.

Front

What does it mean if a scatter plot has a strong correlation?

Back

A strong correlation means that the data points are closely clustered around the trend line, indicating a strong relationship between the variables.

Front

What is the difference between a positive and negative correlation?

Back

In a positive correlation, both variables increase together, while in a negative correlation, one variable increases as the other decreases.

Front

How do you determine the slope of a trend line?

Back

The slope of a trend line is determined by the change in the y-values divided by the change in the x-values between two points on the line.