State whether the following graphs represent a function. Give reason for your answer.

(i)

The above graph represents a function as we know that a graph represents a function only when the curve in the graph cuts the vertical axis only at a single point A.Here the curve cuts the vertical line at point X1 so it’s a function.

(ii)

The above graph represents a function as a vertical line cuts the curve at X1 point.

(iii)

The above graoh doesn’t represents a function as the vertical line and the curve intersects ech other at two points X1 and X2.

(iv)

The above figure doesn’t represent a function as the vertical line cuts the curve at three different points,.

(v)

The graph is are presentation of a function as the straight line is cut at a single point X2 by the vertical line.