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, showing the general direction of the data points.

Front

What does a positive association in a scatter plot indicate?

Back

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

Front

What does a negative association in a scatter plot indicate?

Back

A negative association indicates that as one variable increases, the other variable tends to decrease.

Front

What does it mean if there is no association in a scatter plot?

Back

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

Front

How do you determine the line of best fit visually?

Back

The line of best fit should be drawn so that it has approximately equal numbers of points above and below it, minimizing the distance from all points.

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

What does the slope of a line of best fit represent?

Back

The slope represents the rate of change between the two variables; it shows how much one variable changes for a unit change in the other.

Front

What is the y-intercept in the context of 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

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

Back

An accurate line of best fit closely follows the trend of the data points and minimizes the distance from the points to the line.

Front

What is a scatter plot?

Back

A scatter plot is a graph that displays values for two variables using dots, showing how much one variable is affected by another.