## Thinking Mathematically (6th Edition)

RECALL: The slope $m$ of the line that passes through the points $(x_1, y_1)$ and $(x_2, y_2)$ is given by the formula: $m=\dfrac{y_2-y_1}{x_2-x_1}$ Thus, to find the slope of the line that passes through the points $(-1, 5)$ and $(2, 3),$ the first point can be $(x_1, y_1)$ and the second point can be $(x_2, y_2)$. Therefore, in the given situation, the point $(-1, 5)$ can be considered as $(x_1, y_1)$ and the point $(2, -3)$ can be considered as $(x_2, y_2)$. The given statement makes sense.