Interpreting Function Notation, Graphs, and Context

a. In $5$ AD there were $30$ ducks in the lake.

a. In 1995 ($5$ years after 1990) there were $30$ ducks in the lake.

a. In 2020 ($30$ years after 1990) there were $30$ ducks in the lake.

b. In 2000 ($10$ years after 1990) there were $40$ ducks in the lake.

b. In 2030 ($40$ years after 1990) there were $10$ ducks in the lake.

b. In $10$ AD there were $10$ ducks in the lake.