Answer:
Step-by-step explanation:
[logical equivalence]
[morgan laws]
if
is true, then
is true and
is too.
with
true, then
is false [double denial]
In the first equivalence it follows that
is true [identity law]
Then it can be concluded that 
Yes, this is a linear equation with a constant rate of change (a slope) so the sets of values of the graph are proportional
The answer is A. Sam will serve a total of 6 hours ($30). Each person he serves will give him $3.
The answer E bro hope that helps