Answer:
y = x - 4
Step-by-step explanation:
Base on point A we have X = 0 and Y = -4
then we have this equation:
Y = ax + b
<=>-4 = a*0 + b
<=>-4 = b
so equations have the form of Y = ax - 4
Base on point B we have X = 6 and Y = 2
Y = ax - 4
<=>2 = a* 6 - 4
<=>a * 6 = 6
<=>a = 1
so equations have the form of Y = 1x - 4 = x - 4
so the equations represents line AB is Y=x - 4
Done :))