What is the answer? I don’t get it

Iwill give brainliest only if your correct the words subsequent and submerge both contain the prefix sub. based on this information, what does the prefix sub most likely mean? a) under or secondary b) true or verifiable c) tricky or difficult d) around or centered on

What is value of x? enter your answer in the box. x =

Ineed ! i can’t figure out this graph