River Adventures charges $15 to rent a canoe plus $5 per hour. Use the graph below to determine whether the cost of the canoe is proportional to the number of hours it is rented. ​

v = 1/3 a^2h

step-by-step explanation:

the volume is 1/3 a^2h.

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: