Scatter Plots and Trend Lines (Unit 5 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 axis.

Tags

CCSS.8.SP.A.1

Front

What does a positive linear association in a scatter plot indicate?

Back

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

Tags

CCSS.HSS.ID.B.5

Front

What does a negative linear association in a scatter plot indicate?

Back

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

Tags

CCSS.HSF.LE.B.5

Front

What does 'no association' mean in the context of scatter plots?

Back

'No association' means that there is no discernible relationship between the two variables being plotted.

Tags

CCSS.HSS.ID.B.5

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

How do you determine the slope of a trend line?

Back

The slope of a trend line is determined by the change in the y-values divided by the change in the x-values (rise over run).

Tags

CCSS.8.EE.B.5

Front

What does a slope of -5/7 represent in a real-world context?

Back

A slope of -5/7 means that for every 7 units increase in the x-variable, the y-variable decreases by 5 units.

Tags

CCSS.8.EE.B.5

Front

What is the equation of a line of best fit?

Back

The equation of a line of best fit is typically written in the form y = mx + b, where m is the slope and b is the y-intercept.

Tags

CCSS.8.EE.B.5

Front

What does the y-intercept represent in a scatter plot?

Back

The y-intercept represents the value of y when x is zero, indicating where the line crosses the y-axis.

Tags

CCSS.HSF.LE.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