Please help me please

What is the slope of the line that contains the points (-5, 6) and (14. - 7)?

What are two numbers that have a sum of 15?

Gia opened two savings accounts at two different banks. one account earns an annual 3.4% simple interest, and the other earns half as much. if she deposited $500 in each account, how much total interest will she have earned in 5 years? a. $34.00 b. $25.50 c. $51.00 d. $510.00