Vertical Line Test

Q.

Which graph represents a linear function of $x$?

1. 

2. 

3. 

4. 

Q. Which of the following graph is a function?. Identify using vertical line test.

1. Fig: (iii)
2. Fig: (i)
3. Fig: (ii)

Q. When a vertical line is drawn anywhere on the graph and it intersects the graph at 2 or more points, then the graph is that of a function.

1. True
2. False