First two are the explanation and the last one is the answer :)
Answer:
y=2×+1
Step-by-step explanation:
for the slope of the question that was given
Notice that the box has a total os 4 + 5 + 3 = 12 balls, since there are 4 that are yellow, then, the probability to randomly obtaining a yellow ball in a single draw is:

therefore, the probability is 0.33 = 33%