Which set of ordered pairs does not represent a function

(if f(x)=4x^2 and g(x)=x+1, find (f o g)(x)

Aiden drives to school and back each day. the school is 16 miles from his home. he averages 40 miles per hour on his way to school. if his trip takes 1 hour, at approximately what speed does aiden drive home?

What is the quotient of m^6/5 ÷ 5/m^2? assume m does not equal pl