Scatter Plots and Data Review

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 grid.

Tags

CCSS.8.SP.A.1

Front

What does it mean if a scatter plot shows a positive correlation?

Back

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

Tags

CCSS.HSS.ID.B.5

Front

What does it mean if a scatter plot shows a negative correlation?

Back

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

Tags

CCSS.HSS.ID.B.5

Front

What is the line of best fit?

Back

The line of best fit is a straight line that best represents the data on a scatter plot, showing the overall trend.

Tags

CCSS.8.EE.B.5

Front

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

Back

The slope indicates the rate of change between the two variables; a positive slope means an increase, while a negative slope means a decrease.

Tags

CCSS.8.EE.B.5

Front

What is the purpose of using a trend line in a scatter plot?

Back

A trend line helps to summarize the relationship between the variables and can be used for making predictions.

Tags

CCSS.8.SP.A.2

Front

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

Back

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

Tags

CCSS.HSS.ID.B.5

Front

How can you predict a value using a scatter plot?

Back

You can predict a value by locating the corresponding value on the x-axis and using the trend line to find the expected value on the y-axis.

Front

What is the equation of a line in slope-intercept form?

Back

The equation is written as 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

Front

If a student has 7 absences, how can you use a scatter plot to predict their grade?

Back

You can find the point corresponding to 7 absences on the x-axis and see where it intersects the trend line to estimate the grade.