Scatter Plots and Lines of Best Fit

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.

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What does a line of best fit represent in a scatter plot?

Back

A line of best fit is a straight line that best represents the data points in a scatter plot, indicating the trend of the relationship between the variables.

Front

What is a linear relationship?

Back

A linear relationship is a relationship between two variables that can be represented by a straight line on a graph.

Front

What is an outlier in a scatter plot?

Back

An outlier is a data point that differs significantly from other observations in a scatter plot, often lying far away from the trend.

Front

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

Back

A positive correlation is identified when, as one variable increases, the other variable also increases, resulting in an upward trend.

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

Back

A negative correlation is identified when, as one variable increases, the other variable decreases, resulting in a downward trend.

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, and the data points do not show any trend.

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 slope of a line?

Back

The slope of a line is a measure of its steepness, calculated as the change in y divided by the change in x (rise/run).

Front

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

Back

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