9. It took Ryan less time to hike down than it did to hike up. Ernest thinks that was because Ryan jogged
down the same trail he went up. Emma thinks the trail down was steeper than the trail up. Who is correct
and why? Include a detailed explanation of why each hypothesis does or does not match the graph.
(4 points)

Pls help

figure it out and lmk

Step-by-step explanation: your welcome thanks for the points though

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: