What are the constant proportionality y=0.2x

Jayne is studying urban planning and finds that her town is decreasing in population by 3% each year the population of her town is changing by a constant rate

Okay so i didn't get this problem petro bought 8 tickets to a basketball game he paid a total of $200 write an equation to determine whether each ticket cost $26 or $28 so i didn't get this question so yeahyou have a good day.

Alex's monthly take home pay is $2,500. what is the maximum bad debt payment he can maintain without being in credit overload?