This arithmetic sequence is defined by the function f(n). What is the y-intercept of this function?

9, 13, 17, 21, 25, ...

(Write your answer as an ordered pair.)

Recall ordered pair = ( _ , _ )

The price of a visit to the dentist is \$50$50. if the dentist fills any cavities, an additional charge of \$100$100 per cavity gets added to the bill. if the dentist finds nn cavities, what will the cost of the visit be?