## Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

$y_2-y_1$; $x_2-x_1$
RECALL: The formula for the slope of a line is given by $\dfrac{y_2-y_1}{x_2-x_1}$ where $(x_1, y_1)$ and $(x_2, y_2)$ are two points on the line. Thus, the missing expressions in the given statement (in order) are: $y_2-y_1$; $x_2-x_1$