The first one doesn’t represent a function. This is because it uses the same x-value twice.
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Answer:
4.2
Step-by-step explanation:
10% of 42 is 4.2
Could you attach an illustration? I apologise.
Step-by-step explanation:
Consider the provided statement.
If we lose electricity, then the data will be lost.
We are need to write the negation of the above statement.
First divide the whole statement in two parts
Let us consider p = We lose electricity and q = The data will be lost.
The symbol use for negation is tilde 


Represent T for true and F for False.
The required table is shown below:
p q 
F F F
F T F
T F T
T T F
Hence the required table is shown above.