The graph of y = f ′(x), the derivative of f(x), is shown below. List the intervals where the graph of f is concave down. (–4, –2) U (2, 4)
(–2, 2)
(–4, 0)
(0, 4)

Acoffee shop orders at most $3,500 worth of coffee and tea. the shop needs to make a profit of at least $1,900 on the order. the possible combinations of coffee and tea for this order are given by this system of inequalities, where c = pounds of coffee and t = pounds of tea: 6c + 13t ≤ 3,500 3.50c + 4t ≥ 1,900 which graph's shaded region represents the possible combinations of coffee and tea for this order?