Answer:
1st q answer is f(x) is one- to -one function and 2nd q answer is 2
Sorry, a bit late but i took it and it was A.
So its 12 divided by 1/5 so
12 x 1= 12
1 x 5= 5
That is 12 over 5 and u will divide the numerator by the denominator to get 2.4
Dont know if thts exactly right bcuz its been a while since i learned this but i hope it helps
