which statements is not true

The statement which is not true based on the given graph is:
c= -a
We know that if a number lie to the left of zero on a number line then it is a negative number and if a number lie to the right of zero then it is a positive number.
Hence, a,b<0
Also, a is to the left of b.
This means that:
a<b
Hence, a ≤ b is correct.
Hence,
|b|=c
This means that:
c > 0
Hence, c≠ -a.