A: Speed is Independent as it can be anything with no restrictions. Gas mileage is dependent as it relies on the value of speed for its value to be decided.
B: The first letter of speed is "S" so it can represent the variable. The first letter of mileage is "M" so the variable can be represented by that letter. It really can be any letter.
C: no context
D: no context
The value of p = 11
y = 5x + p
1 = 5(-2) + p
1 = -10 + p
11 = p
The increase in miles would be 11 miles
The anwser is D and I’m sure of it