## Elementary Geometry for College Students (7th Edition) Clone

A(-6,5) B(1,7) C(16,10) Using Slope formula $m_{AB}$= $\frac{y2-y1}{x2-x1}$ = $\frac{7-5}{1+6}$ = $\frac{2}{7}$ $m_{BC}$= $\frac{y2-y1}{x2-x1}$ = $\frac{10-7}{16-1}$ = $\frac{3}{15}$ =$\frac{1}{5}$ $m_{AB}$ $\ne$ $m_{BC}$ Therefore A,B and C are not collinear.