I'm not sure if an equation is needed. Since you put the marble back into the bag the odds are still 50/50 that you will draw either color.
If you would have left it out then it would be dependent because the ratio would change.
Answer:
a = kb
Step-by-step explanation:
"a is directly proportional to b" is expressed as a = kb, where k is the "constant of proportionality."
Answer:
please I can't do it I have not been thought