What are the answers for both of these?

Use the function f(x) is graphed below. the graph of the function to find, f(6). -2 -1 1 2

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?

Which diagram best shows how fraction bars can be used to evaluate 1/2 divided by 1/4?