Please urgently need help

In which source of water would a wave travel the fastest? o ice o cold o room temperature o hot mark this and return save and exit next

Giuseppi's pizza had orders for $931.00 of pizzas. the prices were $21 for a large pizza, 514 for a medium pizza, and $7 for a small pizza. the number of large pizzas was two less than four times the number of medium pizzas. thenumber of small pizzas was three more than three times the number of medium pizzas. how many of each size of pizza were ordered?

Which of the functions below could have created this graph?