Answer:
y=(1/2)x-2
To graph you can use two points (I will use the x and y intercepts)
Put one point on (4, 0) and (0, -2) and you will get your line
Explanation:
A slope of 0.5 is 1/2
in y=mx+b, m is the slope
so now we have: y=(1/2)x+b
we substitute 4 for x and 0 for y
0=1/2(4)+b which simplifies to 0=2+b
so b must be -2
this gives us y=(1/2)x-2