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 does a positive trend line indicate?

Back

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

Front

What does a negative trend line indicate?

Back

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

Front

What does it mean if there is no trend line?

Back

If there is no trend line, it means there is no clear relationship between the variables in the data.

Front

What is the line of best fit?

Back

The line of best fit is the trend line that minimizes the distance between itself and all the data points in a scatter plot.

Front

How do you determine the slope of a line?

Back

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

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 y when x is zero.

Front

What is the equation of a line in slope-intercept form?

Back

The equation of a line in slope-intercept form is y = mx + b, where m is the slope and b is the y-intercept.

Front

How can you tell if a line is a good line of best fit?

Back

A good line of best fit will have most data points close to it, showing a clear trend without large deviations.

Front

What is a scatter plot?

Back

A scatter plot is a graph that displays two variables as points on a Cartesian plane, showing the relationship between them.