To find the slope of a line from two points \((x_1, y_1)\) and \((x_2, y_2)\), you can use the formula:
\[ \text{slope} = \frac{y_2 - y_1}{x_2 - x_1} \]
So the correct response from your options is:
\[ \text{y2 - y1 / x2 - x1} \]
This formula calculates the change in the y-coordinates (rise) divided by the change in the x-coordinates (run).