Dana wants to identify the favorite professional baseball team of people in her community. She stands outside a local sporting goods store and asks
every other person who enters, "What is your favorite professional baseball team?" Will the results of her survey be valid? Explain.
A)The results will not be valid because Dana is only polling every other person who enters the store.
B)The results will not be valid because Dana is only polling people who visit the sporting goods store. This is not a random sample of her community.
C)The results will be valid because anyone could choose to go to the sporting goods store that day.
D)The results will be valid because only people who go to sporting goods stores have a favorite baseball team.

mental cunning

explanation:

he is often referred to as a man of twists and turns

f(x) is the value of the function. b is the value of the function when x equals zero or the y-coordinate of the point where the line crosses the y-axis in the coordinate plane.

step-by-step explanation:

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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: