Answer:
y=1/2x-4
Step-by-step explanation:
We are going to assume a second point on the line other than the one given because we need at least two points to define a straight line.
Let's call the point (x, y)
Having our two points, we know that the gradient of the line joining the two points is the gradient of the line in question. Therefore,
Gradient = ∆y/∆x
1/2 = (y – -2)/(x – 4)
1/2 = (y + 2)/(x – 4)
By cross-multiplication,
2(y + 2) = x – 4
2y = x – 8
or
y = 1/2x – 4
