Help! Is the following relation a function?

Yes or no?

Ajar of gumballs contains 4 reds, 2 greens, and 6 blues. what is the probability of getting two blues in a row without replacement?

F(x)=x/2-2 and g(x)=2x^2+x-3 find (f+g)(x)

If the value of x increases by 5, how does the value of m(x + 3) change? a) it increases by 5m. b) it increases by 8m. c) it decreases by 5m. d) it decreases by 8m.