Answer:
2x+8
Step-by-step explanation:
The sample is biased, because the members of the math club are not the only people that study
Answer:
The slope is
$0.1774 / pounds
Step-by-step explanation:
From the question we are told that
The weight of the rat is 
The cost of feeding the rat per week is
$4.50
The weight of a Beagle is 
The cost of feed a Beagle per week is
$9.20
Now the slope can be evaluated mathematically as

substituting values

$0.1774 / pounds