Which of the following is an ethical method of gathering competitive intelligence?
a. searching a competitor's dump site for data that has been thrown out
b. posing as a customer interested in a product from a competitor's shop c. identifying yourself and asking former customers about the competitor's service d. hiring a person to go on a job interview to get information

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step-by-step explanation:

guess at question:

a vertical line intersects the graph of g(x,y) = 0 at two points. what conclusion follows about the function f(x) implicitly defined by g(x,f(x)) = 0?

the domain of f(x) cannot include the x coordinate of any such vertical line.

informally, f(x) is not a function, and

g(x,y)=0 cannot be solved for y uniquely.

the relation r = {(x,y) such that g(x,y) = 0} is a function if

for all (a,b) ∊ r and (c,d) ∊ r, a=c implies b=d.

step-by-step explanation:

i believe that the answer is

b. y-1=-2(x-4)

hope this !