The table displays the frequency of scores on a twenty-point quiz. The mean of the quiz scores is 18. Find the value of k. Score: 15, 16, 17, 18, 19, 20
Frequency: 2, 4, 7, 13, k, 5
A. 9
B. 11
C. 13
D. 18

it’s the first one your welcome

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: