## Algebra 1: Common Core (15th Edition)

(1,3)(4,2)(-2,4) We find the rate of all three points by using the slope formula ($\frac{b1-b2}{a1-a2}$); AB=$\frac{3-2}{1-4}$=-$\frac{1}{3}$ BC=$\frac{x}{y}$=-$\frac{2-4}{4-(-2)}$=-$\frac{2}{6}$=-$\frac{1}{3}$ They both have the rate of -$\frac{1}{3}$ so they are the same line.