Trend Lines (Line of Best Fit)

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 is the purpose of a line of best fit?

Back

The line of best fit is used to predict values and understand the relationship between variables in a dataset.

Front

What does the slope of a line represent?

Back

The slope of a line represents the rate of change of the dependent variable with respect to the independent variable.

Front

What is the y-intercept of a line?

Back

The y-intercept is the point where the line crosses the y-axis, indicating the value of the dependent variable when the independent variable is zero.

Front

How do you find the equation of a line given the slope and y-intercept?

Back

The equation of a line can be found using the formula: y = mx + b, where m is the slope and b is the y-intercept.

Front

What does a positive slope indicate about the relationship between two variables?

Back

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

Front

What does a negative slope indicate about the relationship between two variables?

Back

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

Front

What is an outlier in a dataset?

Back

An outlier is a data point that differs significantly from other observations, often lying outside the overall pattern of the data.

Front

How can you identify an outlier on a scatter plot?

Back

An outlier can be identified on a scatter plot as a point that is far away from the cluster of other points.

Front

What is the equation of the line of best fit if the slope is -2 and the y-intercept is -6?

Back

The equation is y = -2x - 6.