For several weeks, a server records the number of desserts, d, ordered by diners at each table and the tip, t, in dollars, he receives from that table. He finds that there is a positive linear association between t and d that is best modeled by the equation t = 1.4d + 9.1. What is the meaning of 9.1 in this equation?

When a table orders no desserts, the model predicts the server will earn an average tip of $9.10.

For each dessert ordered, the model predicts that the server will earn an average additional tip of $9.10.

The model predicts that the average tip the server will earn from a table that orders desserts is $9.10.

The model predicts that the average tip the server can expect to earn from any table is $9.10.