Which table represents a function with a slope of 1/2 and a y-intercept of 4

Mrs. morton has a special reward system for her class. when all her students behave well, she rewards them by putting 3 marbles into a marble jar. when the jar has 100 or more marbles, the students have a party. right now, the the jar has 24 marbles. how could mrs. morton reward the class in order for the students to have a party?

What can you determine about the solutions of this system

41/17 as a decimal rounded to the nearest hundredth