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Maths Exercices

Find points on a function graph

The graph shows the total cost C, in dollars, that a customer pays for n pounds of coffee from an online coffee merchant. The total cost includes a fixed fee for shipping.

How much does it cost to order 4 pounds of coffee?

From the graph, we see that the cost to order 4 pounds of coffee is $23.

The graph below displays the relationship between the amount of money a theater collects and the number of tickets the theater sells.

Determine the amount of money the theater will collect if it sells 150 tickets.