Answer :
Linear functions are the ones whose graph is a straight line. So if you graph all the answers into desmos you will see which ones are not linear.
y=x+2 is linear.
y=1/(x+2) is the same as y=1/x+2 and those are rational functions
y=x+2 is linear.
y=1/(x+2) is the same as y=1/x+2 and those are rational functions