I can’t see the picture well!
<h2>The answer is : </h2><h3>The unit is staying constant all over because the x -intecerpt ins +8 and the y is +1</h3>
Step-by-step explanation:
1. 
(chain rule)
2 
Answer:
1/4
Step-by-step explanation:
there is 3 black marbles and 3+4+5=12 total marbles. 3/12=1/4
B because each input has one output
