The correct formula to find the slope of a line from two points \((x_1, y_1)\) and \((x_2, y_2)\) is:
\[ \text{Slope} = \frac{y_2 - y_1}{x_2 - x_1} \]
So the correct response from the provided options is:
\[ \text{Start Fraction } y_2 - y_1 \text{ over } x_2 - x_1 \text{ End Fraction} \]