Please help me with one and two and show work or explain

1) yes it's function

2) no, it's not function

Step-by-step explanation:

1 is function because the x coordinate (x,y) point which is the input isn't repeating. But for number 2 as you can see that 20 in the input you see 2 arrows are coming out of it which means 20 as in the input is used more than one time and like we said the input should not repeat. I hope this helped you.

option a.

step-by-step explanation:

if you look closely at the graph, we can notice that the function is not defined at two different points.

if you look at functions b and c, you will notice that both functions are not defined at just one point. the function b is not defined at x= -5/2 and function c is not defined at x=-5. both options are discarded, given that our function should not be defined at two fiferent points.

now, if you look closely at the graph you will notice that the function sketched is not defined at x=5 and x=-2.

answer:   rlly

step-by-step explanation: