The lowest common multiple of 3 and 5 is 15. 3 and 5 have no factors in common. Thus, the LCM of 3 and 5 is just 3 and 5 multiplied together, or 3×5, which is 15.
Y=2x +4 is non proportional because b does not equal 0 The b in the equation is 4 As long as the y intercept is not more or less than 0, than it will be proportional
