The cost of a long-distance phone call, in cents, can be modeled by the ceiling function whose graph is shown. how much does it cost to talk for 3.1 minutes? 2 cents 3 cents 4 cents 5 cents

the answer is d. 75%

no i do not : ( what is it?

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:

jml angle lkj & angle mj = lm