There are 60 seconds in a minute there are 60 minutes in an hour how many seconds are in one hour

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?

Can any one me with the answers to these questions asap?

What is the slope of the line that contains the points (-2,1) and (0,-3)