Question

x | y
5 | 5
11 | 11
13 | 13
18 | 18
y =

Explanation:

Step1: Analyze table data

Observe that for every $x$ value, $y=x$.

Step2: Analyze graph slope

Pick two points, e.g., $(0,0)$ and $(1,1)$. Slope $m=\frac{1-0}{1-0}=1$.

Step3: Find y-intercept

The line crosses the y-axis at $(0,0)$, so $b=0$.

Step4: Write linear equation

Using $y=mx+b$, substitute $m=1, b=0$.
$y=1x+0$ simplifies to $y=x$.

Answer:

$y = x$