Plotting to determine collinear

Question

I plotted (0,-1),(3,5),(-1,-3) and determined that they were in fact  Collinear...just want to doublecheck

Answer 1

(0,-1),(3,5),(-1,-3)

 

m1 = (-1-5)/(0-3) = 2

 

m2 = (-3-5)/(-1-3) = 2

 

Yep! They're collinear!