Linear Equation: A linear equation is a mathematical equation that represents a straight line on a graph, where the relationship between the variables is constant and can be expressed as $y = mx + b$, where $m$ is the slope and $b$ is the y-intercept.
Slope: The slope of a line is a measure of its steepness, and it represents the rate of change between the two variables. The slope is calculated as the rise (change in $y$) divided by the run (change in $x$).
Inverse Relationship: An inverse relationship is a relationship between two variables where an increase in one variable corresponds to a decrease in the other variable, resulting in a negative slope.