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, showing 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 does 'no association' mean in a scatter plot?

Back

No association means there is no discernible relationship between the two variables being plotted.

Front

How can you use the line of best fit to make predictions?

Back

You can use the equation of the line of best fit to predict the value of one variable based on the value of another.

Front

What is the formula for a line of best fit in slope-intercept form?

Back

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

Front

What is the slope in the context of a line of best fit?

Back

The slope represents the rate of change between the two variables; it indicates how much y changes for a unit change in x.

Front

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

Back

The y-intercept is the value of y when x is zero; it represents the starting point of the line on the y-axis.

Front

How do you determine the line of best fit using a graph?

Back

You can visually estimate the line that best represents the trend of the data points or use statistical methods like least squares.

Front

What is the purpose of using a line of best fit in data analysis?

Back

The purpose is to summarize the relationship between variables and to make predictions based on that relationship.