Trend Lines and Scatter Plots

Front

What is a trend line?

Back

A trend line is a straight line that best represents the data on a scatter plot, showing the general direction of the data points.

Tags

CCSS.HSF-LE.A.1B

Front

What does a positive correlation indicate?

Back

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

Tags

CCSS.HSS.ID.B.5

Front

What does a negative correlation indicate?

Back

A negative correlation indicates that as one variable increases, the other variable decreases.

Tags

CCSS.HSS.ID.B.5

Front

What does no correlation mean?

Back

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

Tags

CCSS.HSS.ID.B.5

Front

How do you identify a positive correlation on a scatter plot?

Back

A positive correlation is identified by data points that slope upwards from left to right.

Tags

CCSS.HSS.ID.B.5

Front

How do you identify a negative correlation on a scatter plot?

Back

A negative correlation is identified by data points that slope downwards from left to right.

Tags

CCSS.HSS.ID.B.5

Front

What is a scatter plot?

Back

A scatter plot is a graph that displays values for two variables for a set of data, using dots to represent the data points.

Tags

CCSS.8.SP.A.1

Front

What is the purpose of a trend line in data analysis?

Back

The purpose of a trend line is to summarize the relationship between variables and make predictions based on the data.

Tags

CCSS.8.SP.A.2

Front

What is the formula for calculating the slope of a trend line?

Back

The slope (m) is calculated as m = (y2 - y1) / (x2 - x1), where (x1, y1) and (x2, y2) are two points on the line.

Tags

CCSS.8.EE.B.5

Front

What does it mean if a trend line is steep?

Back

A steep trend line indicates a strong relationship between the variables, meaning a small change in one variable results in a large change in the other.

Tags

CCSS.HSF-LE.A.1B