Does anyone know the answer to this the work is not needed unless you would like but Please please please answer :)

In what form is the following linear equation written y=9x+2

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?

25 ! the line of best fit is h = 5a + 86. predict the height at age 16.