The time needed to roast a chicken depends on its weight. Allow at least 15 min/lb for a chicken weighing up to 6 lbs. Allow at least 20 min/lb for a chicken weighing more than 6 lbs. Let y represent the time in minutes needed to roast a chicken of weight x, where x is measured in pounds.
Which inequalities represent the time needed to roast a chicken?
a. y > 15x for x < 6 and y > 20x for x > 6 c. y > 15x for x < 6 and y > 20x for x > 6
b. y > 15x for x < 6 and y > 20x for x > 6
d. y > 15x for x < 6 and y > 20x for x > 6