HELP!! Which of these graphs represents a function

ANSWER OPTIONS:
A. W
B. X
C. Y
D. Z

the aswere is the one with all 8's and the second one is with the 10,8 and 6

step-by-step explanation:

first, you divide the triangle in two, tô form a retangle triangle. after, using pythagoream theorem:

18^2 = 14^2 + (x/2)^2

(x^2/4) + 196 = 324

x^2/4 = 324 - 196

x^2/4 = 128

x^2 = 512

x = √512

x = √2^9

x = 16√2 cm

i hope i you.