Help me plz i dont get it

The table shows the distance traveled over time while traveling at a constant speed.

In what form is the following linear equation written y=9x+2

12. the amount of money in a bank account decreased by 21.5% over the last year. if the amount of money at the beginning of the year is represented by ‘n', write 3 equivalent expressions to represent the amount of money in the bank account after the decrease?