Question

Does the graph represent a function? 4 5 6 7 -3+ no O yes

Answer 1

To prove:

The given graph is a function.

The given graph is a function if and only if no x value has more than one value of y, or we can say that a graph is a function iff no vertical line intersects the graph in more than one point.

Thus, by the given graph it is clear that for x = 7 their are two values for y that is y = -6 , -7

So, the given graph is not a function