Scatter Plots & Line of Best Fit

Front

What is a scatter plot?

Back

A scatter plot is a graph that shows the relationship between two quantitative variables by displaying data points on a two-dimensional axis.

Tags

CCSS.8.SP.A.1

Front

What does the line of best fit represent in a scatter plot?

Back

The line of best fit represents the trend of the data points in a scatter plot, indicating the general direction in which the data points are moving.

Tags

CCSS.8.SP.A.2

Front

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

Back

The slope of a line of best fit is determined by calculating the change in the y-values divided by the change in the x-values between two points on the line.

Tags

CCSS.8.EE.B.5

Front

What is the purpose of using a line of best fit?

Back

The purpose of using a line of best fit is to make predictions about one variable based on the value of another variable.

Tags

CCSS.8.EE.B.5

Front

What is correlation in the context of scatter plots?

Back

Correlation refers to the strength and direction of a relationship between two variables, which can be positive, negative, or none.

Tags

CCSS.HSS.ID.B.5

Front

What does a positive correlation look like on a scatter plot?

Back

A positive correlation on a scatter plot appears as a pattern where, as one variable increases, the other variable also increases.

Tags

CCSS.HSS.ID.B.5

Front

What does a negative correlation look like on a scatter plot?

Back

A negative correlation on a scatter plot appears as a pattern where, as one variable increases, the other variable decreases.

Tags

CCSS.HSS.ID.B.5

Front

What is the formula for a linear equation in slope-intercept form?

Back

The formula for a linear equation in slope-intercept form is y = mx + b, where m is the slope and b is the y-intercept.

Tags

CCSS.8.F.A.3

CCSS.8.EE.B.6

Front

How can you use a scatter plot to make predictions?

Back

You can use a scatter plot to make predictions by extending the line of best fit to estimate the value of one variable based on the value of another.

Front

What is the significance of outliers in a scatter plot?

Back

Outliers are data points that fall far from the trend of the other points and can significantly affect the line of best fit and the overall analysis.