Line of best Fit

Front

What is a line of best fit?

Back

A line of best fit is a straight line that best represents the data on a scatter plot. It shows the general direction of the data points.

Front

How do you determine the line of best fit?

Back

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

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 does 'no correlation' mean in a scatter plot?

Back

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

Front

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

Back

Front

What is the slope of a line?

Back

The slope of a line measures the steepness and direction of the line, calculated as the change in y over the change in x (rise over run).

Front

How can you identify a line of best fit on a scatter plot?

Back

You can identify a line of best fit by looking for the line that minimizes the distance to all points, balancing the points above and below the line.

Front

What is the significance of the y-intercept in a line of best fit?

Back

The y-intercept is the point where the line crosses the y-axis, representing the value of y when x is zero.

Front

What does it mean if the line of best fit has a slope of zero?

Back

A slope of zero indicates that there is no change in y as x changes, suggesting a horizontal line and no relationship between the variables.