Need pl i don’t really understand its 2 questions. questions 6 and 4

Number six is a function, if you take your pencil and move it horizontally(top to bottom) if you hit more than one pointed plot at the same time then it is not a function but if you only hit one plotted point one at a time then it is a function so yes 6 is a function and I can't see question number 4 so I can't help on that

The spanish and portuguese ruled latin america for much of the 16th, 17th and 18th centuries. during this period were enslaved