Question 140782
Using the formula y=mx+c

x + 2y = 4 -x on both sides we get 2y = -x + 4

divide both sides by 2 

then you get

y intercept is when x = 0
x intercept is when y = 0

y = -1/2x + 2

y = 2

Now time for x

x + 2y = 4

subtract 2y to both sides

x = -2y + 4

x = 4

Gradient = -1/2

Hope that helps ya :D