A data set has no correlation. Is it possible to find a line of fit for the data

What value of x is in the solution set of 4x - 12 s 16 + 8x? -10 -9 -8 -7

Can someone check if i did this correct. it’s number 4 if you’re wondering.

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.