Answer:
The correct options are 1, 2 and 4.
Step-by-step explanation:
The vertex form of an absolute function is
[tex]f(x)=|x-a|+b[/tex]
Where, (a,b) is the vertex of the function and x=a is axis of symmetry.
The function is symmetric with respect to the y-axis. It means the axis of symmetry is x=0. It is possible if the value of a in the vertex form is 0.
In option 1,
[tex]f(x)=|x|[/tex]
Here, a=0 and b=0.
Since the value of a=0, therefore it is symmetric with respect to the y-axis.
In option 2,
[tex]f(x)=|x|+3[/tex]
Here, a=0 and b=3.
Since the value of a=0, therefore it is symmetric with respect to the y-axis.
In option 3,
[tex]f(x)=|x+3|[/tex]
Here, a=-3 and b=0.
Since the value of a≠0, therefore it is not symmetric with respect to the y-axis.
In option 4,
[tex]f(x)=|x|+6[/tex]
Here, a=0 and b=6.
Since the value of a=0, therefore it is symmetric with respect to the y-axis.
In option 5,
[tex]f(x)=|x-6|[/tex]
Here, a=6 and b=0.
Since the value of a≠0, therefore it is not symmetric with respect to the y-axis.
In option 6,
[tex]f(x)=|x+3|-6[/tex]
Here, a=-3 and b=-6.
Since the value of a≠0, therefore it is not symmetric with respect to the y-axis.
Hence the correct options are 1, 2 and 4.
