Help plz is fue today

Plzzz i beg u so much asaaaap ! what is the slope of this line? enter your answer in the box.

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?

Complete the solution of the equation. find the value of y when x equals to 6 4x+y=20