I believe her hourly wage is $14/h because since she works an unpaid day for every day she does work. Therefore the 50% of her daily wage goes to the next day...
(y2-y1)/(x2-x1) (-3 - (-8))/(6- (-5))= 5/11
I assume you're referring to a function,

where <em>a</em> is some unknown constant. By definition of the derivative,

Then
