# Help with a few questions?

##### 1 Answer

Here's Help!

#### Explanation:

In order for a set of points to be a function, **there must be only one #y# output for every #x# input** . I could express it like this:

For a data set to be a proper function:

Or think about it this way: If you were for example, graphing the path of a **single** ball through the air, if

**TO ANSWER YOUR QUESTION**

The first question provides a table listing the points:

(-4,0)(-1,-3)(-3,5)(-1,1)

Within the points,

The second question provides a mapping diagram. However, 6 maps to both 0 and 4 within the diagram, therefore that's a relation too. **No relation can also be a function at the exact same time**

And if that ball of yours exists at both 5 and 10 meters at the exact same time, well you just might want check it out...

Hope that helps!