Could anyone me with any of these questions? 5,6,7 i missed the lesion on them and i need to show work and explain!

What is the name used to describe a graph where for some value of x, there exists 2 or more different values of y?

Julie goes to the sports store and spends $40.50 before tax. she buys a pair of shorts for $21.75 and 3 pairs of socks that each cost the same amount. how much does each pair of socks cost? $$

What is 1.5% of 120 or what number is 1.5% of 120