the equation of the line is:

Explanation:

Step1: Find the slope (m)

For a line in the form $y = mx + b$, the slope $m=\frac{y_2 - y_1}{x_2 - x_1}$. Let's assume two points on the first - line. From the graph, we can take two points, say $(0,0)$ and $(1,2)$. Then $m=\frac{2 - 0}{1 - 0}=2$. The y - intercept (b) is 0 (where the line crosses the y - axis). So the equation of the first line is $y = 2x$.

Step2: Find the slope of the second line

For the second line, assume two points, say $(0, - 1)$ and $(1,-3)$. Then $m=\frac{-3+1}{1 - 0}=-2$. The y - intercept (b) is - 1. So the equation of the second line is $y=-2x - 1$.

Answer:

The equation of the first line is $y = 2x$; the equation of the second line is $y=-2x - 1$