Which graph shows a non linear function

Write a corresponding real world problem to represent 2x - 125=400

Parks is wearing several rubber bracelets one third of the bracelets are tie-dye 1/6 are blue and 1/3 of the remainder are camouflage if parks wears 2 camouflage bracelets how many bracelets does he have on

What is the result of converting 60 ounces to pounds remember there are 16 ounces in a pound