Question

Please help!

The table shown below represents a function. Which of the following values could not be used to complete the table?

https://media.glynlyon.com/g_alg01_2012/3/table1.gif


-20
-15
-5

Answer 1

I think its -5

Answer 2

it is -5 because a function cannot have more than one value for x, if it does it is not a function.

There is such thing as the vertical line test which helps to test whether an equation is a function or not.

Vertical Line Test

Pass - The equation is a function




Fail - The equation is NOT a function