What is the slope of the line that represents this relationship?

The last time i bought this product , it cost $20.00 but it looks like it cost 29. 60 today? what is the increase

This is my question~~ ( r ^ 4 - 2r ^ 3 - 23 r ^ 2 - 4r - 32)÷(r+4) ~~ i must use long division to solve it : / i was wondering if anyone world like to solve it. and if so, share step-by-step explanations! you! ❤

We have 339 ounces of jam to be divided up equally for 12 people how muny ounces will each person get