Can you me with my expanded notation

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

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

Mr. jones determined that the equation y = 98 - 16/5 x could be used to predict his students' unit test scores, based on the number of days, x, a student was absent during the unit. what was the meaning of the y-intercept of the function? (by the way the 16/5 is a )