Answer:
It is not a function
Step-by-step explanation:
The plot shows (1, 1) and (1, 3) are both defined by the relation. It does not pass the "vertical line test", which requires the relation be single-valued everywhere.
Answer:
C. 2 + (-3)
Step-by-step explanation:
-2.69 can be rounded to -3 and 1 can be rounded to 2
Answer:
is sometimes positive and sometimes negative.
Step-by-step explanation:

Take 

Take 

Hence
for
and
for 
So
is sometimes positive and sometimes negative in the interval.
Answer:
static electricty
Step-by-step explanation:
it is preserved charge
So the answer is D hope this would help you