## Introductory Algebra for College Students (7th Edition)

m=$\frac{y_2-y_1}{x_2-x_1}$ m=$\frac{-5-10}{-2-3}$ m=$\frac{-15}{-5}$ m=3 m=$\frac{y_2-y_1}{x_2-x_1}$ m=$\frac{-9-6}{-1-4}$ m=$\frac{-15}{-5}$ m=3 These lines have the same slope so they are parallel.