She made 14 dollars and hour if that was your question
The fromula of a slope:

a) (-1, -8), (-7, -4)
substitute

b) (2.1, 3.8), (3.1, 7.6)
substitute

It would be -50 because the rule is subtract by 2 then 4 then 6 then 8 and etc.
WARNING THIS IS THE WRONG ANSWER in case any of you look at this
6 goes in the box, as it is being multiplied by the other numbers.