Trend Lines (Line of Best Fit)

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

What is the purpose of a line of best fit?

Back

To make predictions about future data points based on the trend of existing data.

Front

What does the slope of a line represent?

Back

The rate of change of the dependent variable with respect to the independent variable.

Front

What is the y-intercept in a linear equation?

Back

The value of y when x is 0; it is where the line crosses the y-axis.

Front

What is the general form of a linear equation?

Back

y = mx + b, where m is the slope and b is the y-intercept.

Front

How do you determine the slope from two points (x1, y1) and (x2, y2)?

Back

Slope (m) = (y2 - y1) / (x2 - x1).

Front

What does a positive slope indicate?

Back

As the x-value increases, the y-value also increases.

Front

What does a negative slope indicate?

Back

As the x-value increases, the y-value decreases.

Front

What is an outlier in a data set?

Back

A data point that is significantly different from the other points in the data set.

Front

How can you visually assess the line of best fit?

Back

By observing how closely the line follows the trend of the data points.