The question is in picture the picture provided
pls help and don't troll

Ineed to know the ordered pairs for this equation i need the answer quick because it’s a timed test

How can i differentiate this equation?

Julie begins counting backwards from 1000 by 2’s and at the same time tony begins counting forward from 100 by 3’s.   if they count at the same rate, what number will they say at the same time?