When two equation are parallel it means they have the same slope.
You have the equation:
You can identify the slope(m) as the number next to the x in equation that follow the next form:
Then, the equation parallel to the given equation has an slope of:
m= - 1/2
Now, if we have a point of the equation we can find the value of the b (y-intercept) in the slope - intercept form of a lineal equation:
The given point is ( -4 , 2)
You have the next values:
m= - 1/2
y= 2
x= -4
Then we substitute that values:
And clear the b:
Now, we get the value of the slope (m= - 1/2) and the y-intercept (b=0)
We can write the equation in slope - intercept form:
or: