Question

x | y
0 | 3
3 | 6
15 | 18
17 | 20
y =

Explanation:

Step1: Identify relationship pattern

Check $y-x$ for each pair:
$3-0=3$, $6-3=3$, $18-15=3$, $20-17=3$

Step2: Formulate linear equation

Since $y - x = 3$, rearrange to solve for $y$.
$y = x + 3$

Answer:

$y = x + 3$