You have to calculate the probability that it lands on 4. There are 2 possibilities from the 8 that it lands on 4. So the chance is 2/8, which is the same as 4/16
The strings cost $14. you would take the total cost ($72) and subtract the cost of the book ($16) and you would get $56. you would then divide 56 by the number of book bought (4 in all) and you would get $14.
In a class of 24 kids, for every 1 boy there are 4 girls
The first thing that shoyuld be noted is that you have linear functions here : straight lines in your graph
