How do curves a and b compare to each other with respect to f and f ′?

Hmm, we see that the red line intersects the x axis at around the same place where the concavity of the blue line changes

so i would say that the blue line is f(x) and the red line is f''(x)



if the red line was a derivitive of the blue line, it should intersect the x axis at about x=0 and x=0.9 which it doesn't

they aren't derivitives of each other

3rd option

The answer is a 5/20 because if u add all of the marbles there are 20 and there are 5 red marbles so 5/20 is the answer mark as brainliest