Which relation is a function?

after 1 year: 221 deer

step-by-step explanation:

30% of 170 is 51. 170+51=221

there would be 162.15 calories in this cereal.

step-by-step explanation:

the answer to this is a. a^2 + b^2 = c^2

a and c

for infinitely many solutions we require both left and right sides to be equal

distribute and simplify

a

14 - 8x = 20 - 8x - 6 = 14 - 8x ← both sides equal so infinite solutions

b

6x - 54 = 6x - 54 + x = 7x - 54 ← not equal

c

4x + 16 = 4x + 10 + 6 = 4x + 16 ← both sides equal so infinite solutions

d

5x - 40 + 10 = 5x + 10

5x - 30 = 5x + 10 ← not equal