An arithmetic sequence starts out $–23, –19, –15, …$

1. Write an equation for the sequence.

   Hint (a):

   What is the common difference between the terms?

   More Help (a):

   Remember that the first term is $−23$. What is the $0$th term?

2. Which term of the sequence is the first term to have a value over $10,000$?

   Hint (b):

   Use the equation you wrote in part (a). Set it equal to (or greater than) $10,000$.