In 1952, a smog outbreak blanketed the capital city of England, killing as many as 12,000 people. Fog combined with many smoke from many sources to produce this disaster. Which of these was the LEAST contributor to the smoke that caused the smog? A) car exhaust B) subway trains C) home chimneys D) factory smokestacks

B

Explanation:

Yes

Key features: the functions can not be parallels, this means that their respective slopes can not be equal or multiple to the other

Step-by-step explanation:

Take for instance 2 linear functions,  and

If they intersect in some point in the space, say that is

Then (x1,y1)=(x3,y3), (x2.y2)= (x3,y3)

So, we can compare the two functions and get the following result;

It tells us that if M=m, we get an error, meaning that the functions are in fact parallels and there is no way that they meet in some point.

hope this helps!