Can someone help me NOW pls I can’t solve these

Answer:
You need to know 3 things to solve Example 1:
P.S.: These are absolute value bars → ║.
Answer:
top half
Step-by-step explanation:
13 is 6
14 is 5
15 is -7.4
16 is 0.2
17 is 8.4
18 is -46
19 is -18
20 is 14.6
21 is -8.4