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Answer:
OPTION A: 
Step-by-step explanation:
We should know that:

So, 

This is equivalent to 
Hence, OPTION A is the answer.
Answer:= -1
Step-by-step explanation:
Answer: a
Step-by-step explanation:
because if there is 600 just add 300 to get 900 so that is your anwser
Slope=(y1-y2)/(x1-x2) then plug in the points using the formula: (2-8)/(-4-5)= -6/-9 which simplifies into 2/3 which is the slope