Braces, also called curly brackets in used to list the elements of a set in a roster notation.
While parenthesis is used in interval notation.
The total amount of money he had to pay for the bike is $3,954.02 because 6 percent of 7 is 4.2
Answer
Part A
1 - 1
2 - 3
3 - 6
4 - 10
5 - 15
Part B
Now plot these points on the coordinate plane
(1,1) (2,3) (3,6) (4,10) (5,15)
Part C
It is NOT a linear function