Help plss problem/question in image ​

Which of these people has balanced their checkbook correctly? oa. gary: the balance in his check register is $500 and the balance in his bank statement is $500. b. gail: the balance in her check register is $400 and the balance in her bank statement is $500. c. gavin: the balance in his check register is $500 and the balance in his bank statement is $510.

15 point ! ~ see if you know the answer to both you!

Which of the following is true for the relation f(x)=2x^2+1