How do you identify the slope for x - 2y = 4x2y=4?

1 Answer
Apr 7, 2015

Let's remember the general linear equation of y=mx+cy=mx+c
We have to arrange x-2y=4x2y=4 into the form of y=mx+cy=mx+c

x-2y=4x2y=4
-2y=-x+42y=x+4

We have to ensure that the coefficient of y is 1 to get linear equation.

-2y=-x+42y=x+4 From here, we divide the whole equation by -2

(-2y)/-2=(-x+4)/-22y2=x+42
y=1/2x-2y=12x2

Let's refer to the general linear equation: y=mx+cy=mx+c where mm is the slope of a line.
y=1/2x-2y=12x2
From here, we can see that 1/212 is in the place of mm as the slope.
Thus, m=1/2m=12