Answer:
x∈R
Step-by-step explanation:

2>0
The domain is all real numbers.
x∈R
Answer:
The slope is 
Step-by-step explanation:
∵ The rule of the slope passing through 2 points is:
m = 
∵ The points are (7 , 8) and (-7 , 1)
∴ m = 
Answer:
$69,250
Step-by-step explanation: