Question

Plot the following lines on graphs, and identify which among them is not a linear function.

Answer 1

$\underset{–}{y=x}$

$x$	$y=x$
2	2
1	1
0	0
-1	-1
-2	-2

By plotting these points, we get:


$\underset{–}{y=2x}$

$x$	$y=2x$
2	4
1	2
0	0
-1	-2
-2	-4

$\underset{–}{y=3x}$

$x$	$y=3x$
2	6
1	3
0	0
-1	-3
-2	-6

Each of the given options is a straight line. Thus, each of the given options represents a linear function.

Thus, the correct option is "None of the above".