Answer:
-1
Step-by-step explanation:
goes down 1 across 1
Answer:
the discount is 3.75 and that subtracted is 22.25
Step-by-step explanation:
25-3.75=22.25
Answer:

Step-by-step explanation:
If you add a number that is negative, you are basically subtracting it.
This means that

Since they both have the same denominator, you can easily subtract the fractions: 
Answer:
R is a function.
Step-by-step explanation: