What is the equation of the line shown in this graph?

Over the last 8 nights, elyse earned the following in tips: {105, 120, 84, 95, 100, 132, 140}. if she earns $140 a night for the next four nights, which measure of center would increase more, the mean or median?

Answer! if you don’t mind, can you explain

Susie wants to take her friend out for lunch. she wants to spend $9.75 each person. how much will she spend in all.