Line of Best Fit

Front

What is the line of best fit?

Back

The line of best fit is a straight line that best represents the data on a scatter plot. It shows the trend of the data points.

Front

What does a positive association in a graph indicate?

Back

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

Front

What does a negative association in a graph indicate?

Back

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

Front

What is correlation?

Back

Correlation measures the strength and direction of a linear relationship between two quantitative variables.

Front

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

Back

Front

Back

A slope of -2 indicates that for every 1 unit increase in x, y decreases by 2 units.

Front

What is a scatter plot?

Back

A scatter plot is a graph that shows the relationship between two quantitative variables using dots to represent data points.

Front

What does it mean if there is no correlation between two variables?

Back

No correlation means that there is no predictable relationship between the two variables; changes in one do not affect the other.

Front

How do you determine the line of best fit on a scatter plot?

Back

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

Front

Back

The y-intercept is 6, which means the line crosses the y-axis at the point (0, 6).