Line of best fit - scatter plots

Front

What is a line of best fit?

Back

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

Front

How do you determine the equation of a line of best fit?

Back

By using statistical methods such as linear regression to find the slope and y-intercept that minimize the distance between the line and the data points.

Front

What does a positive correlation indicate in a scatter plot?

Back

As one variable increases, the other variable also increases.

Front

What does a negative correlation indicate in a scatter plot?

Back

As one variable increases, the other variable decreases.

Front

What is an outlier in a scatter plot?

Back

A data point that is significantly different from the other data points, often lying far away from the trend.

Front

How can you identify an outlier in a scatter plot?

Back

By visually inspecting the plot for points that do not follow the general trend of the other points.

Front

What is the y-intercept of a line?

Back

The point where the line crosses the y-axis, indicating the value of y when x is 0.

Front

What is the slope of a line?

Back

The measure of the steepness of the line, calculated as the change in y divided by the change in x.

Front

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

Back

There is no discernible relationship between the two variables; changes in one do not predict changes in the other.

Front

How do you find the slope of a line given two points?

Back

Use the formula: slope (m) = (y2 - y1) / (x2 - x1).