ANSWER
[tex]y=-\frac{1}{5}x[/tex]
EXPLANATION
As we can see, line j passes through the origin, so its y-intercept is zero and the equation has the form,
[tex]y=mx[/tex]
To find the slope we have to use the formula,
[tex]m=\frac{\Delta y}{\Delta x}[/tex]
In this graph,
Δy = 1 and Δx = 5, but the line is inclined to the left, so the slope is negative,
[tex]m=-\frac{1}{5}[/tex]
And the equation is,
[tex]y=-\frac{1}{5}x[/tex]
