Okay, the first step to answering this probelm is finding the slope of this line.
The equation for slope is
y₂-y₁
-------
x₂-x₁
Plug the points in
-2 - 0 -2 1
------- = --------- = - ------- (negative 1/5)
10 - 0 10 5
Now we will use the point slope equation
y - y₁ = m(x- x₁)
Lets use the point (10,-2)
Plug in the x,y, and your new slope- then simplify
y +2 = -1/5(x -10)
y + 2 = -1/5x + 2
y = -1/5x
That's your final equation!
