Line of best fit - scatter plots

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 trend of the data points.

Tags

CCSS.8.EE.B.5

Front

How do you determine the equation of a line of best fit?

Back

You can determine the equation of a line of best fit using methods such as least squares regression, which minimizes the distance between the data points and the line.

Front

What does a positive correlation indicate in a scatter plot?

Back

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

Tags

CCSS.HSS.ID.B.5

Front

What does a negative correlation indicate in a scatter plot?

Back

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

Tags

CCSS.HSS.ID.B.5

Front

What is the y-intercept of a line?

Back

The y-intercept is the point where the line crosses the y-axis, represented by the value of y when x = 0.

Front

What is the slope of a line?

Back

The slope of a line indicates the steepness and direction of the line, calculated as the change in y divided by the change in x (rise/run).

Tags

CCSS.8.EE.B.5

Front

If the equation of a line is y = 2x + 3, what is the slope?

Back

The slope is 2.

Tags

CCSS.8.EE.B.5

Front

If the equation of a line is y = -rac{1}{2}x + 6, what is the y-intercept?

Back

The y-intercept is 6.

Tags

CCSS.8.EE.B.6

CCSS.8.F.A.3

Front

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

Back

No correlation means there is no apparent relationship between the two variables; the data points do not show any trend.

Tags

CCSS.HSS.ID.B.5

Front

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

Back

You can visually identify the line of best fit by drawing a straight line that best represents the trend of the data points, minimizing the distance from the points to the line.

Tags

CCSS.8.EE.B.5