Question 253774: Is there an instance when a linear equation is not a function? Found 2 solutions by MRperkins, richwmiller:Answer by MRperkins(300) (Show Source):
You can put this solution on YOUR website! are vertical lines linear? Are they functions? How would you write the equation for a vertical line?
email me at justin.sheppard.tech@hotmail.com
I will be happy to discuss this with you
You can put this solution on YOUR website! A function associates each element in the domain with exactly one element in the codomain which means that for each x there is only one y.
Let's look at the vertical line with one x but many y's
x=3
The slope is undefined since x never changes. So the denominator is 0.
