Whats the Expression and area

On a piece of paper graph y < 3x

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

The average daily maximum temperature for laura’s hometown can be modeled by the function f(x)=4.5sin(πx/6)+11.8 , where f(x) is the temperature in °c and x is the month. x = 0 corresponds to january.what is the average daily maximum temperature in may? round to the nearest tenth of a degree if needed.use 3.14 for π .