Answer:
Step-by-step explanation:
Use the following formula:
slope: 
Let:

Plug in the corresponding numbers to the corresponding variables:

is your answer.
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Answer:
C
Step-by-step explanation:
Option C is the correct answer.
Answer:
r≤9
Step-by-step explanation:
Answer:
$13.80
Step-by-step explanation:
So we start with 12.99 then we have to multiply that by 0.06 to find what we would add which is 0.7794. After this we add 12.99 with 0.7794 and it becomes 13.7694 round this to the nearest hundredth and it becomes 13.80