1. Consider the function R(x) where R is a function whose domain is all x, such that x > 0. R(x) rounds x up to the nearest integer. [4 points]

(a) Evaluate each of the following:
6
R(3.15) = 3
5
R(1.01) = 1
4
R(5) = 5
3
2
(b) Graph R(x) on the grid to the right
1
1 2 3 4 5
6