Is the relationship linear, exponential, or neither?

How to use order of operation in 20 divide by 4 multiply 5 = 1

Logan wants to know how many skateboards have defective parts. he inspects 20,000 skateboards and keeps track of the number of defects per board. use his probability distribution table to find the expected value for defects on a skateboard.

Twelve less than a number is at most 20