To determine the total cost for buying 10 of the type A markers based on the provided information, we can first analyze the line labeled A on the graph.
The coordinates given for line A are \( (0, 0) \) and \( (3, 6) \). This indicates that the cost for buying 3 markers is $6.
To find the cost per marker, we can perform the following calculation:
\[ \text{Cost per marker} = \frac{\text{Total cost}}{\text{Number of markers}} = \frac{6}{3} = 2 \text{ dollars per marker} \]
Now, to find the total cost for 10 type A markers, we can multiply the cost per marker by the number of markers:
\[ \text{Total cost for 10 markers} = \text{Cost per marker} \times \text{Number of markers} = 2 \times 10 = 20 \text{ dollars} \]
Therefore, the total cost for buying 10 of the type A markers would be $20.00.