Flashcard- Scatter Plots and Trend 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 grid.

Front

What does a positive correlation indicate in a scatter plot?

Back

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

Front

What does a negative correlation indicate in a scatter plot?

Back

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

Front

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

Back

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

Front

What is a line of best fit?

Back

A line of best fit is a straight line that best represents the data on a scatter plot, used to make predictions about future data points.

Front

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

Back

The equation of a line of best fit can be determined using statistical methods such as linear regression.

Front

What is the purpose of using a line of best fit in data analysis?

Back

The purpose is to make predictions based on the trend observed in the data.

Front

What does the slope of a line of best fit represent?

Back

The slope represents the rate of change between the two variables; it indicates how much one variable changes for a unit change in the other.

Front

What does the y-intercept of a line of best fit represent?

Back

The y-intercept represents the value of the dependent variable when the independent variable is zero.

Front

How can you identify a strong correlation in a scatter plot?

Back

A strong correlation is indicated by data points that are closely clustered around the line of best fit.