Scatter Plots

A scatter plot is a graph that shows the relationship between two quantitative variables by displaying data points on a two-dimensional axis.

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

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

It means there is no discernible relationship between the two variables; the data points are scattered randomly.

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

A positive slope can be identified when the data points trend upwards from left to right.

A negative slope can be identified when the data points trend downwards from left to right.

A slope of 0 indicates that there is no change in the dependent variable as the independent variable changes; the line is horizontal.

The slope (m) is calculated using the formula: m = (y2 - y1) / (x2 - x1).

The slope indicates the rate of change between the two variables and helps to understand the strength and direction of their relationship.