Trend Lines or Lines of Best Fit

Trend Lines or Lines of Best Fit

What is the Line of Best Fit or Trend Line?

• It is used in scatter plots.

• It is a linear function.

• It follows the trend of the data, which means it goes the same direction as the points.

• It divides the points approximately half way.

Multiple Choice

Which line is a good trend line?

• line P

• line L

• line M

Multiple Choice

Why is line M not a good trend line?

• It has a positive slope.

• It follows the trend.

• It does not follow the trend.

Multiple Choice

Why is line P not a good trend line?

• There are too many points below the line.

• There's not enough points below the line.

• It does not follow the trend.

Multiple Select

Which of these statements describe this scatter plot? (Check all that applies.)

• It has an upward trend.

• Since it is upward, the slope of the trend line is positive.

• It has an downward trend.

• Since it is downward, the slope of the trend line is negative.