Step-by-step explanation:

Answer:
219 + 159 <= x <= 369 + 309
378 <= x <= 678
Step-by-step explanation:
For f(x) to be a function, the value of x should not be repeated. That is no x value can be more then once.
So the required table is

And for g(x) , not to be a function, we have to repeat x value that is

Answer:
n = 145
Step-by-step explanation:
-58 ÷ -0.4 = 145
n = 145