Trend Lines and Scatter Plots v2

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.

Front

What does a scatter plot represent?

Back

A scatter plot is a graph that shows the relationship between two variables by displaying data points on a Cartesian plane.

Front

What is the purpose of a line of best fit?

Back

The line of best fit is used to summarize the relationship between variables in a scatter plot, helping to predict future values.

Front

How do you determine the line of best fit?

Back

The line of best fit is determined by minimizing the distance between the data points and the line, often using the least squares method.

Front

What does a positive slope indicate in a trend line?

Back

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

Front

What does a negative slope indicate in a trend line?

Back

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

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.

Front

What is the y-intercept of a line?

Back

The y-intercept is the point where the line crosses the y-axis, indicating the value of y when x is 0.

Front

What does it mean if a scatter plot shows no correlation?

Back

No correlation means there is no apparent relationship between the two variables, and the data points do not follow a pattern.

Front

What is the difference between correlation and causation?

Back

Correlation indicates a relationship between two variables, while causation implies that one variable directly affects the other.