Step-by-step explanation:
y = f(X) = 3x - 7
3x = y + 7
x= (y +7)/3
f ^-1(x) = (x + 7)/3
Nikkis charges are 20,40,50,80. Dave’s charges are 25 and 37.5.
Answer: i think is A or B
Step-by-step explanation:

Answer:
the answer is perpendicular I think :)