scatterplots

Front

What is a scatterplot?

Back

A scatterplot is a graphical representation of two variables, showing the relationship between them using points on a Cartesian plane.

Front

What does the line of best fit represent in a scatterplot?

Back

The line of best fit represents the trend in the data, indicating the general direction of the relationship between the two variables.

Front

How do you determine the line of best fit?

Back

The line of best fit can be determined using statistical methods such as least squares regression, which minimizes the distance between the points and the line.

Front

What does a positive correlation in a scatterplot 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 scatterplot indicate?

Back

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

Front

What does it mean if there is no correlation in a scatterplot?

Back

No correlation means that there is no apparent relationship between the two variables; the points are scattered randomly.

Front

What is the purpose of a trend line in a scatterplot?

Back

A trend line helps to visualize the overall direction of the data points and can be used for making predictions.

Front

How can you use a scatterplot to make predictions?

Back

You can use the trend line to estimate the value of one variable based on the value of another variable.

Front

What is the significance of outliers in a scatterplot?

Back

Outliers are data points that differ significantly from other observations; they can affect the line of best fit and the overall analysis.

Front

What is the formula for a linear equation of a line?

Back

The formula for a linear equation is typically written as y = mx + b, where m is the slope and b is the y-intercept.