Introductory Algebra for College Students (7th Edition)

m=$\frac{y_2-y_1}{x_2-x_1}$ m=$\frac{4-1}{2-6}$ m=$\frac{3}{-4}$ m=-$\frac{3}{4}$ m=$\frac{y_2-y_1}{x_2-x_1}$ m=$\frac{1-(-2)}{-3-1}$ m=$\frac{3}{-4}$ m=-$\frac{3}{4}$ These lines have the same slope so they must be parallel.