Answer:
Velasquez’s appointment to the position of a painter to Philip IV impact his artistic career as it allowed him to paint freely with new painting techniques.
King Philip IV became his patron, where he could paint without worrying about expenditures and finances.
Holding a position in the court of King Philip IV allowed him to travel across Europe in places like Venice, Rome, Cento, Ferrara, Bologna and Loreto.
He also gained and expanded his artistic styles from Italian painters in his visits to Italy.
Therefore, we can conclude that Velasquez’s appointment to the position of a painter to Philip IV improved his artistic career as he spend most of his life in Madrid under the Spanish monarchy.