Pls answer asap i’m taking a test ahhh

First, It's a function.

Second, domain is {a,b,c,d}

Third, range is {x,y,z}

Reason why it's function because

1. A single value in Input doesn't have 2 lines connected (domain must not be repetitive.)

2. All Inputs have lines connected to Output (if not then not a function.)

chad should not have included the values (1, 2) and (3, 6) because that would mean he only had half a healing card.

just sum

10 + 10 = 20