Question

Marcel claims that the graph below represents a function. у 3 2+ 1 + --4 -3 -2 -1 -1 2 -27 -3+ 4+ State whether Marcel is correct. Justify your answer.

Answer 1

This graph does not represent a function because it doesn't pass the vertical line test.

For a graph to represent a function, there should be only one y value for every value of x.

But from this graph, when x is 2, we have two values of y.

Which means

x y

2 3

2 -1

Therefore, this graph does not represent a function

ANSWER:

Marcel is wrong, the graph doesn't represent a function.