Scatter Plots & Best Fit Lines

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 a trend line represent in a scatter plot?

Back

A trend line, or line of best fit, represents the general direction that a group of points seem to be heading, indicating the relationship between the variables.

Tags

CCSS.8.EE.B.5

Front

What is positive correlation?

Back

Positive correlation occurs when an increase in one variable leads to an increase in another variable, resulting in a trend that slopes upwards.

Tags

CCSS.HSS.ID.B.5

Front

What is negative correlation?

Back

Negative correlation occurs when an increase in one variable leads to a decrease in another variable, resulting in a trend that slopes downwards.

Tags

CCSS.HSS.ID.B.5

Front

What does no correlation mean?

Back

No correlation means there is no discernible relationship between two variables; changes in one variable do not affect the other.

Tags

CCSS.HSS.ID.B.5

Front

How do you interpret a scatter plot with a positive correlation?

Back

In a scatter plot with a positive correlation, as one variable increases, the other variable also tends to increase, indicating a direct relationship.

Tags

CCSS.HSS.ID.B.5

Front

How do you interpret a scatter plot with a negative correlation?

Back

In a scatter plot with a negative correlation, as one variable increases, the other variable tends to decrease, indicating an inverse relationship.

Tags

CCSS.HSS.ID.B.5

Front

What is the purpose of a line of best fit?

Back

The purpose of a line of best fit is to summarize the relationship between the variables in a scatter plot and to make predictions based on that relationship.

Tags

CCSS.8.EE.B.5

Front

How can you use a trend line to make predictions?

Back

You can use a trend line to make predictions by extending the line to estimate the value of one variable based on the value of the other variable.

Tags

CCSS.8.EE.B.5

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.

Tags

CCSS.8.EE.B.6

CCSS.8.F.A.3