Emily is trying a new diet that requires eating no candy bars. When Emily begins the diet, she is consuming 20 bars each week. The graph represents the decrease in the number of bars that Emily eats per week. Which inequality states the range of the graphed function?
A) R: {0 ≤ x ≤ 12}
B) R: {0 ≤ y ≤ 12}
C) R: {0 ≤ x ≤ 20}
D) R: {0 ≤ y ≤ 20}