What is the equation of the line?

What values of c and d make the equation true?

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

Jackie purchased 3 bottles of water and 2 cups of coffee for the family for $7.35. ryan bought 4 bottles of water and 1 cup of coffee for his family for 7.15. how much does each bottle of water cost? how much does each cup of coffee cost?