How many proportional relationships are shown in the coordinate plane below? Help I need the answer ASAP!!!

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?

Weak battery is considered to be a part of routine a. inspection b. wear and tear c. maintenance d. check

What is the difference between the predicted value and the actual value