Is the following relation a function?

Question

anonymous · Answer

attachment

anonymous · Answer

No

anonymous · Answer

For a relation to be a function then for ever input there can only be 1 output value.  Example on a graph for every value of x there can be only one value for y.  You can also use the vertical line test to determine if it is a function.  
If you can draw a vertical line and it touches two or more lines then it is NOT a function.

anonymous · Answer

It does not pass the vertical line test: a graphical test to determine a whether a function is or is not... functional...

larseighner · Answer

It is a (single-valued) function if no vertical line contains more than one point of the relation.  Does any vertical line contain two points of the relation?

anonymous · Answer

Last part was a joke. If a line you draw vertically can pass through more than one point on the line/curve etc. then what you have is not a function.

anonymous · Answer

Thank you guys! That helps a lot.