A local small business will donate money to the student council based on the number of carnival tickets sold. The points shown on the graph represent the model. A graph with number of tickets sold on the x-axis and money donated on the y-axis. Points are at (10, 5), (20, 10), (30, 15), and (40, 20).

Use the graph to complete the table.

A 2-column table with 4 rows. Column 1 is labeled Tickets sold with entries 10, b, 30, 40. Column 2 is labeled Money donated with entries a, 10, c, d.

a =
b =
c =
d =