Brit knows that the numbe 4 is a perfect square. which multiple of 4 is also a perfect square.

1²=1

2²=4

3²=9

4²=16

5²=25

6²=36

7²=49

8²=64

9²=81

10²=100

11²=121

12²=144

13²=169

14²=196

15²=225

16²=256

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value

the answer is c just got it on ed

step-by-step explanation: