The following figure shows the normal distribution with the proportion of the area under the normal curve contained within one, two, and three standard deviations of the mean.

18a

step-by-step explanation:

simply because it is. it's the highest common factor

probability for j is 1/4

while

a is 1/6

- both graphs increase on their domain.

- the graphs of both functions have the same x-intercept.

- neither graph has a y-intercept.