Answer:
5x-4y+5=0.
Step-by-step explanation:
1) if the point A(-5;-5) and B(3;5), the formula is:

2) according to the formula above:

or 5x-4y+5=0.
Answer:
I think that the best unit rate is Grande: 16oz ; $4.25
Ron must work 9 hours. If he makes 300 every 5 hours, that means he makes 60 every hour. 60x9 = 540