scatter plots and line 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.

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 discernible relationship between the two variables; changes in one do not affect 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, showing the trend of the data.

Front

How do you identify an outlier in a scatter plot?

Back

An outlier is a data point that is significantly distant from the other points in the scatter plot, often appearing far from the main cluster.

Front

What is the formula for a linear equation?

Back

The formula for a linear equation is y = mx + b, where m is the slope and b is the y-intercept.

Front

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

Back

The slope represents the rate of change between the two variables; a steeper slope indicates a stronger relationship.

Front

What is the y-intercept in a linear equation?

Back

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

Front

What is a nonlinear association?

Back

A nonlinear association occurs when the relationship between the variables cannot be accurately represented by a straight line.