All you have to do is plug in.
x = 1 , y= 8
3x+5=y
3(1) + 5 = 8
3+5 = 8
8=8
They are both equal, yes. The coordinates work out in the equation. Both sides are equal so the coordinates work. The answer is yes.
Usually I would use my head, but you can use whatever you want.
Take a better pic and i will explain in comment
Step-by-step explanation:



Answer:
Prism d has the greater volume
Step-by-step explanation: